**** of a story
It's always been true he was homeless, he literally went from house to house of some of his friends & a few of relatives, he didn't have a place to stay every night, sometimes he was legit on the street or sleeping in a friends car. His Ma dukes basically chose his Step dad over him & he was left to survive on his own.
As far as what he's going through now, who knows, but unless you lived it yourself you can't really judge someone's upbringing, different situations & circumstances affect people differently. He's been through a lot & obviously part of his attitude comes from having to fend for himself. That doesn't justify all his actions, but it obviously still impacts the way he sees things & does things his own way.