I would also be concerned over that warping of the railing and the spacing. Not much attention to detail. What is the last picture of? If a craftsman does his job correctly the first time, no need to have to go back to fix it!

The last picture is of the cabinet for under the kitchen sink. I would think a professional installer would be able to cut holes based on a template, but it seems like they basically eyeballed it and cut it a bit rough around the edges.

I'm not sure what that rack & rail contraption is or does...

But I'm not going to blame the installer yet. May be a quality control issue with whoever manufactured the rack.

Is this an add-on item or did it ship with the cabinets?

Please post a photo of the pull out in an extended position. (This may be a design issue---some pull-outs have no way to anchor the full length of the door--meaning the top half/ two-thirds of the door is kinda' flopping in the breeze & can/ will warp.) There really isn't much/ anything the installer can do with faulty design.

I would think a professional installer would be able to cut holes based on a template, but it seems like they basically eyeballed it and cut it a bit rough around the edges.

No it does not look like they eyeballed it. People complain about this all of the time here. Your install looks quite neat in comparison. Whoever did these cut-outs took more time & effort with the cut-outs than most do.

What did the back of the old sink cabinet look like? Or perhaps there wasn't a sink 'cabinet' in place before? May have had built in place cabinets or factory cabinets and just a 'sink front' before?

In real life, once the sink is hanging in there and all of the water connections/ pipes/ hoses are cluttering up the space plus all the stuff that you store in there, you won't notice it.

The only concern that I would have is that it appears that the drain has burped a bit on the floor of the cabinet. I would get that wiped up pronto & slip a pan or bowl underneath the drain to catch any future drips until the drain line gets connected.

pkp:

Place a straightedge against the pullout door please. That will tell you if you need to replace a warped door or if the door simply needs adjustment. I'm betting on the latter.

Have them remove the switch plate covers, add electrical box extensions, and install oversize covers to cover their hack job cutouts please. Now the receptacles are just proud of the cabinet back where they belong.

Kyle’s switchplates has oversized covers.

The back of that cabinet does not look awesome but that's better than average. Lots of contractors would have cut out a big square that included both outlets and the plumbing. I would want them to do what Joseph suggests, extend the boxes and put on larger covers and maybe get some escutcheons for the pipes, but that's really elective.

I have the same issue with the trash pull out and it is a design issue and not an installation issue. The design of the trash pull out I had in my previous kitchen was different and more firmly attached than the one they used in my new construction. I did not skimp! It just seems to be the design/model that is currently sold/available. A friend also has the same issue with her trash pull out in her new construction. It hasn't bothered me that much so far, that I want to spend time looking at alternative designs. I'll get around to it once the house is actually finished!.