Imagine being such a scum that you spend almost every day of your life stalking a half-blind girl and harassing her because you can't deal with your own problems and insecurities. I'd say he deserved that beating.
Technically, could he claim self-defense because the assailant instigated the incident by assaulting one of his friends?
Also the bit about him wishing he was never born is a bit too much of an overreaction...Sure he was a dick, but that's something you say when you commit several homicides, warcrimes, or things on the same moral level.