Maybe it's me. But I can't tell whether I'm looking up, down or sideways, in a closet, a cabinet or a room. (I once had a client file an indignant complaint with the warranty programme that the underside of a laminate counter wasn't finished.)

The standard to judge anything is not from 4". Its from 36" back. 9x as far away. Also, wood expanding and contracting and showing the joins is perfectly normal. You will never not see joins in wood.

Tile job is sloppy and poor workmanship, I would ask all to be fixed, wood might just need chalk.

A properly cut, glued and nailed scarf joint goes a long way to minimizing the seam as the wood expands and contracts. Those joints are sloppy. I could spot those bad joints from 5' away, let alone 36". Same goes for your first picture - why bother cutting a piece of tile when you can fill it with grout?

Several things here that are sub-par. A proper layout of tile would not have left that skinny sliver along the wall. To compound matters, the sliver they cut for that space is even narrower. And badly cut. Instead of re-cutting a properly sized piece, they then grout it in? That, and the missing tile, suggest that your contractor didn't have enough tile and tried to stretch it to the max, hoping you were blind.

The gap is obviously due to a miss-cut. Too short. And the tiler obviously could see this before setting it, but chose to install it anyway. Why? Again, suggestive of a shortage of tile.

And a contractor trying to see what you'll tolerate. On the other hand, this could be solely on a tile setter who wasn't supervised, and the GC hasn't even seen it yet. Bring it to his/her attention immediately.

As for the molding, butt joints to seam a run are a bit of a shortcut. Caulk and paint should help, but a scarf joint is superior.

None of it is acceptable.

I am wondering if they plan on putting shoe molding around the bottom of the floor to cover those imperfection in the tile job. They may also not have caulked and painted the trim joints - that one in the crown looks a bit wide - but always hard to tell in a picture.

Demand to be fixed. Don’t do a final sign off until your satisfied With everything. And don’t fall for the “we will come back and fix later” routine.

I wouldn't say caulking is a fix. It's really masking sub-par workmanship. However, they may have done the job to the best of their ability.