I could not feel bad for Gabe. I tried. I know he is a desperate, overwhelmed man, but god he was an asshole.
Word, word, WORD!
I don't feel sorry for his parents either. I suspect Gabe caught on at an early age that being obnoxious and loud would get him whatever he wanted from his parents. They chose to be doormats.
And what makes Gabe look even worse is having his story being told next to Vanessa's who, obviously, has a true chemical imbalance/psychological problem that she just can't control on her own.