He's mad that this is as good as it gets. The big house, the good school, the nice neighbourhood. It's difficult for kids these days, in a way. The country's very prosperity had become a burden, a dead end. Everything works, doesn't it? At least if you're white and middleclass. So it must often seem to young people that they're not needed. So, in a sense, it's as if there's nothing more to do.
Except tear it apart.