Bully
Pestkop (original)
Danny is a student that barely gets any attention at home because his mother is mentally ill. At school however, he is very popular and known as a big bully. His main victim is Suus, a lesbian classmate who faces many problems due to her sexual orientation.
Watch "Bully" from streaming services Netflix, Amazon Prime released in 2017. It's a kids and drama movie, and has a rating of 5 out of 10 from Imdb which is fairly low for this kind of movie.