New 5th wheel purchase. I think we have a lemon, need advice

Who made this RV? I think it's clear all the little things missed during pdi can/will be fixed without any trouble at all.
If the windows are truly not square, as you state, then the framing isn't either I would assume. In this case the trailer is going to need major enough repairs that everyone involved would say it's probably easier for factory to buy it back. But are the Windows really out of square? Or is it trim that is out of place? An optical illusion maybe?