So that kind of "emotional abuse" is abnormal? Gee we are a bunch of arseholes in Oz. Xanders life was freaking amazing, when compared with abuse that comes from other places than words.
Never underestimate the effect of neglect and a bad word said to a child constantly from the people who are supposed to love and support them. Especially when that child gets bullied in school. So, both home and school are a constant nightmare. Never underestimate the fear of watching your parents fight, throw things at each other, and putting you in the middle. If Xander's life was amazing, then why would he avoid spending time with his folks on special occasions like Christmas and Thanks Giving? If his life was amazing then why did he want to visit Willow's mother but not his parents? Why did he call them scary?
Now Xander mentions that his father tried to sell him once. Clearly that accounts for abuse. Clearly his father attempted that when he was drunk.
Xanders parents cant be blamed for his shitty choices as much as they can be blamed for his good ones.
I didn't blame them for his bad choices. I said the way he was raised shows in how he handles his life. But his mistakes are his responsibility.