The accent tile not being lined up with center of window bothers me most. Keep the Curtain pulled closed works for when not in it and dim lights while in use.

Would invest in a tool and product specifically sold for the purpose of removing excess grout smeared on the blocks and tile. It can be done. If what looks like concrete blocks (size/shape) is tile, you'll want to focus on not scratching the tile wall beside the grout and that requires specific tools. There are You Tube vids for that.

https://www.youtube.com/results?search_query=How+to+remove+excess+grout+from+tile+

If the blocks are painted concrete blocks (not tile), you might even consider using a sander and/or wire brush to remove the excess grout and the paint from the blocks and then repaint the blocks.

Would seriously consider repainting all the painted surfaces -- dry wall and door and both door and window trim -- either white or the lightest gray color from the vertical tile beneath the window.

To be clear, what appears to be a messy grouting job is actually the tile. No sanding to be done.

Last another year or two? Options I'd consider:

-professional resurfacing (don't know if it can work on glass tile)

-retiling over it (bonding primers for tile exist and I've seen a pro do this on YT)

-cheapest option: tension rod installed higher than the tile with inexpensive clip hooks from which I'd hang a pretty tapestry fabric (check Society 6) I'd keep closed

Another tip: make sure light bulbs are daylight type to get the brightest and most flattering light in the space. Nothing worse than hating one's bathroom while bemoaning one's tired complexion. :P

Tartenmeup has the best idea: install a rod as high as possible and keep the shower curtain in place all the time so you don’t see those tiles!!

A longer/ taller shower curtain is an option however, the current curtain rod is a curve and bolted into the tile. If removed I would have holes in the tile in addition to hideous tile.
Thanks for all the comments. I have a plan.....
Show comments to my husband. 😁
Paint drywall near white with gray undertones
Remove towel rack over toilet because it is also ugly
Install new lighting fixture which would include daylight bulbs
Add new shower curtain to ceiling with an additional curved rod.

No need to remove existing curtain rod! Existing rod holds a shower liner while the new tension rod installed on the wall just above the tile holds the pretty tapestry. (Now, I say tapestry because that fabric had the right dimensions to cover the width and length of my bath. Long enough shower curtains I loved were beyond my budget. :))

Regardless of whether you decide on using a straight or a curved rod, it makes no difference to remove the current rod and leave holes behind. You’re going to remove the tiles when you redo the room! Just fill the holes with silicone caulk; I don’t think anyone will focus on them when they’re hidden behind the shower curtain.

Someone was colorblind or artistically challenged. Hang a new shower curtain on a higher rod and get a curtain you can’t see through so you won’t have to look at the tile/wall color clashing. Save up to have the shower tile redone. I like the rest of the bathroom.

You all have been helpful. Thank you.

Definitely a "what were they thinking???" moment. I feel for you. I wonder if really really patient scrubbing with a Magic Eraser (or a dozen) could do any good. I agree with the shower curtain idea. The rest of the bathroom seems fine.

I wonder if they were cut with a dull blade or not a wet saw.

I think you should fix it know, it looks like a mess and makes your bathroom look ugly.

Whatever you do, do NOT paint the tile! We bought a condo where the previous owners painted the shower wall and floor tiles with epoxy paint. It’s peeling like crazy! We’re in the planning process with our contractor to gut the whole bath.

Maybe one of those BathFitter companies that put in over your existing tub or shower? I don’t know how much that costs.

It's not your taste, but the bathroom is fine. You say that you can't redo, but have you checked what it will cost? Perhaps it's doable after all.

Again to be clear. What appears to be drippings of grout is actually the tile design. The grout itself is well done. The tile is smooth as fine china. Nothing to chip away at or scrub upon.

Hiding or distracting are both good options. For distraction, a striking wallpaper would work well. With the faux European antique tile, you could make a jewelbox room.

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Serengeti Green Zebra Safari Scalamandre Self Adhesive Wallpaper, Green, Bolt · More Info

Bibliotheque Wallpaper · More Info

Would not add "fabric" to a shower area -- multiple shower curtains could work.

Pity they didn't do the entire shower in the vertical gray ... which doesn't look all that bad.

You could create a outside shower curtain and keep it closed all the time, visually shrinking the room and blocking any natural light from the window -- but would use plastic rather than "fabric" for that because a bathroom without ventilation is going to have moisture issues.

If you're open to covering the actual tile inside the niche, instead of adding something/anything loose, you could just cover the tile with self installed shower enclosure paneling or, my very much not-a-pro DIY preference, would be to rough up the surface of the larger white blocks of tile and go ahead and paint it with a marine paint -- a paints specifically intended for boats and wet spaces.

Seriously, it already looks like a poorly done DIY job anyway, so as long as you use the right kind of paint and properly PREP it, how much worse can it get? There are a number of You Tube vids on the subject.

https://www.youtube.com/watch?v=iOxOb-P7dEQ

RustOleum tub and tile refinishing kit for WALL tile only.

Clean with a "rough" sponge -- such as used for pans with stuck food

Using abrasive cleaner -- Comet

Then use a hand sander sand paper for more cleaning and, important, roughing it

If painted before ... might need to remove all the old paint

When you paint, using thinner multiple coats are preferable to slopping on thick globs

Fumes last a day so be prepared for that -- need warmer weather so you can

open windows and use masks -- better to not have children in the house near the room being painted -- at least make sure they are in another room with windows open if not outside.

Different paint/product required for tile floors.

the bathroom is so sad the grout is crying...

Ok, well, that is a series of unfortunate choices right there.

But since you have to live with it for now, I think a change to the paint colour in the room might help. The pale yellow isn't working well with the colour of the tile IMO.

Maybe try to find a paint colour that blends well with the tile colour, a light taupe colour might be nice. I've just been using Benjamin Moore Natural Cream and I'm wondering if it might work for you. It reads a little more grey than cream in my space but it is a very pleasant colour. You'd need to get some samples and see what works.

benjamin moore natural cream - Google Search · More Info

And I think I'd get a nice plain white shower curtain and keep it closed most of the time.

I am curious. You say the grout is fine. And you mentioned the tile was smooth. I can not imagine what sort of tile a person would put on any wall that looks like that. Was it removed from another wall and put in the bathroom? The grey areas of the tile look like grout or stain or chips. Is there a design to those tiles? I am just curious. I believe putting a shower curtain on the back wall would be fine, but what about the side walls?

"Is there a design to those tiles?"

Yes, I do believe OP expressed that this is the design of the tiles. They were meant to look "shabby chic". Very unfortunate.

My apologies because I don't think I expressed my idea clearly. I did not mean a fabric to cover the tiles. I simply meant use a large fabric as a second shower curtain in front of the actual shower curtain. Shower curtains are too short to span the height of the tile, hence my suggestion of using a Society 6 polyester tapestry (40% off today - around $50 for the large size of 88" x 108"). The tension rod (less than $20 at HomeGoods/HomeSense) is installed a few inches above the tile, a half inch offset from current rod. Space is left open between tension rod and ceiling and there's no air circulation issue. (Another inexpensive fabric source is tablecloths.)

Hundreds of pages of designs (digital art, regular art, photographs) on Society 6 and all sorts of prints (abstracts, geometrics, florals...). Sort by colour, style, type of art....(Examples below with green because of sink.)

Society 6 does offer shower curtains but they're regular size (71" x 74").

Unfortunately, you'll still surrounded by the same tiles once in the bath or shower but perhaps an enjoyable view glimpsed beforehand can make you smile? Heck, you can even give yourself a different view for inside the bath.

My idea is more of a distraction than a fix, I realize. Again, apologies for not being clearer. :)

I recall that tile from Floor and Decor... That tile was weird enough but then add marble and glass to the mix. I agree with others- a tall shower curtain and a white or pale grey on the will help a lot.

Reminds me of the trend to wear ripped, holey jeans! It just conditions us to be poor, shabby and unkempt; thinking we are style mavens!

"Maybe one of those BathFitter companies that put in over your existing tub or shower? I don’t know how much that costs."

They'll hook you up with a 1/8" thick acrylic wall panels for about five thousand dollars. Takes 'em a day.

Wow. They were design challenged, weren't they? I'm afraid to ask what's on the floor. I agree that a wall color more in line with the tile will help immensely. Do that first. Then choose a coordinating shower curtain.

This one definitely takes the cake. Get a custom shower curtain made to hide it and don't cringe too much each time you have to use the shower.

To everyone commenting....With all 27 comments it is clear we can't do muchto hold it over without incurring additonal dollars. To that end, the tile will come down sooner rather than later. Thank you EVERYONE!!!