Elfen Lied, Dwaeji-ui Wang Recommendations
The main character had a terrible experience in the school/institution they were in and getting called derogatory names.
The main character made friends in the school/institution environment while the story progresses but an unwanted event happened that broke the friendship.
The main character became really violent due to the circumstances.
The main character inevitable fate in the front of many people were quite similar.
Both contain graphic violence that may turn off some of the viewers, especially the animal abuse scene that is present in both shows.
Both shows are dubbed as edgy shock value dependent shows, but tell the effects of bullying to the victims in a hard way.