
Beacuse author put character setting in right direction. This story is not using toxic seme like regular aimless manga. Author clearly shows that he is not some like normal regular person ,he clearly don't understand or feels emotions like other people . The context and story direction matters when you show the bad characters. I don't think toxic character are the problem in mangas but the unrealistic reaction they show by the victim towards his abuser in some manga is problem.
His ex got some serious issue maybe mc stop talking with him because his constant crazy behaviour cause his suicide troupe we are getting here.