Responses
I didnt understand you when you say bully you mean rapist? or just the correct meaning of the word?
I think http://www.mangago.zone/read-manga/bj_alex/ is going this way, although Alex doens't call names and etc, his attitude towards the uke is not very nice and I think it is a defense mechanism.
And
http://www.mangago.zone/read-manga/never_understand/
I've read Hidoku Shinaide, but I want to read more bully-related yaoi mangas, where one of them is a bully and at one point he opens up or at least the manga/manhua shows that the bully is only bullying as a defense mechanism against his emotional problems and how he feels mistreated and misunderstood. And in the end, the other person (who's being bullied) was able to understand him and help him become a better person and get rid of his problems.