You are being too nitpicky.

Are those pics 3 different spaces. I see the first pic shows a poorly cut tile that for sure should have been recut , the others sort of the same issue not nearly as bad . I see everything is now grouted so you need to talk to the tiler but I would want that top pc tile to be redone the others it might not be possible to get it better maybe the 2nd one but the bottom one I am not sure . Can you take a pic from further back please and post in a comment here do not start another post.

Yes, these are 3 different spots.  The top one is the worst for sure.  The gap from the poor cut is bigger than the grout lines.  I will take some more pics today.

The pics are too close up to tell if you are being nit picky or not. No one looks at a backsplash from a nose length away. Take photos from a more natural standpoint - i.e. like what it would look like when you are standing in your kitchen looking at it, not peering at it from an inch away or twisting your neck to see it underneath the upper cabinets.

This looks like a nice install and within normal tolerance. Step back a couple of feet to assess. I like the grout color you selected.

I will take a picture from farther away in a bit.  The really bad one caught my eye immediately.  There is under cabinet lighting and that makes it more obvious, I think.  I am not trying to sound snotty, but our home is a new construction that is pretty expensive.  If it was a remodel job in our current home, I don't know that it would bother me as much. I just think for the price point of this house, there shouldn't be as many "oh well" mistakes.

I generally prefer matching grout. Maybe just fill the space in the first pic with grout that matches the tile.

@ABC Not sure about your assumption about either our budget or grade of cabinets.  The tiler was able to notch the tile just fine in other areas, so it can be done.