If I remember correctly, he watches as this guy (the leader of a bullying group of shits) destroys some other kids at the school. And after watching it happen and trying to prevent it, you get into a fight with the bully.so if you learned to fight to turn your bully into a sissification process... i think you deserved getting bullied!
Without getting TOO off-topic here...
The feeling that you get when you see what Ethan is doing... The frustration you feel when Zach betrays the MC... That makes you want to punch him into a bloody mess. Valeria's kick to the groin was absolutely perfectly timed!