Hyunjin might have been a bully in his school times (We never know, at the end, all idols are fake anyways), but he doesn't write songs about it and endorses it as something cool like BP does
what you mean by might have been a bully?
he is not "might" , he is the bully. confirmed by authorities, by JYP , by the man himself.
but i get it , you took it from him i guess. go on. lmao