If it wasn't part of the job description, I wouldn't expect it to be part of his bid to fix existing structure. On the other hand, since almost nothing is square, he still should have been able to put molding in without gaps by adjusting his cuts. And cabinets by scribing or at least cover up with molding. Baseboard molding is almost always uneven, that why shoe and caulk are used. I guess you have to figure out if he was working in a tough environment or if he's trying to find an excuse for his sloppy work.