Campus bullying, intimidation, insults, beatings... Sometimes we wonder why this happens, why he always likes to bully you and target you. He doesn't bully, he bullies you because he is also being bullied.
Specifically, they bully you because you are not in their group. If you want to join them, you have to bully someone weaker than you. A group is maintained by insulting others, and false friendships are maintained by insulting each other.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.