Sorry about your bad experience, man.
I'm wrapping up the body work on my s13 and one thing I know is that body work takes so much time. Between sanding, priming, filler, more sanding, even more sanding, etc. it takes a long time and it's not easy labor. The spraying is the fun part. I just can't imagine Maaco or comparable shops that charge $500 for prep and paint do enough work to get a good result. Do you really think most of those places color sand?