The Berserker of Remnant

Betrayed, Bullied & Cheated Male Reader x RWBY.
Y/N Matou is a student of Beacon Academy. Well he was a student of Beacon before he was betrayed. He was bullied by not only a few students, but by whole Beacon Academy (and yes even the teachers were included). Y/N endured it for a long time, but he just couldn't bear it anymore. But there was one thing, that caused him to hate everybody. One day, Y/N and his team were sent on a mission. Y/N was given no information whatsoever (only the location of where to go). Y/N had a bad feeling about it, but decided to shrug it off, believing that Ozpin wouldn't do any bad things....... he was so wrong. When he and his team arrived at the location, Y/N was backstabbed by his teammates. They left him behind and said to the teachers that Y/N ran away since he was a 'coward'. The other students and teachers believed them of course. After some time, a strange individual appeared and killed anybody who even remotely hurt/threatend a girl with the name Sakura Matou. That individual was named Berserker, due to the wild behaviour it possessed. Little did they know that the Berserker was actually Y/N, who swore to himself to protect his little sister from anyone.... even if it meant killing innocents. How will the students react when they find out about Berserker's secret? More importantly, will Y/N forgive his bullies? Or will he just kill them like he did with thousand others? Only one way to find out.
Disclaimer: I don't own anything. Just this story.