"He caulked the trim to the cabinets"

What do you mean by fix this?

"and the cuts on the tile aren't even in that corner."

Looks pretty dam good from here, what exactly do you dislike? I think you may be being too picky and you will most likely not get any better than that in my opinion.

There is nothing to be “fixed”. Trim gets caulked and painted. Tile wraps the corner in mirror images of a full tile, and all changes of plane get caulked. Throw away your microscope and stop expecting the sausage making ptocess to be the completed brown tasty morsel on your plate. It’s full of bloody parts and pieces. Remodeling is a messy process. This isnt finished, and he isn’t done.

I'm not sure what I'm looking at in the top photo. The corner tile looks like a very good job.

Looking at the second picture, I also think that he did a nice job in that corner

I'll share additional photos once the grout is cleaned up the tiles at the corner are not cut straight and are very wavy edged.

This looks "nice?" Wow.

Yes, please do give us pics of the finished product. Sometimes pics from during the process can be a bit misleading.