I noticed Morty Smith and Kenny McCormick here too. Morty tried to roofy his crush and caused an apocalypse because of it. Kenny innapropriate pictures of girls iirc and exchanged a photo of a girl’s buttcrack with Stan (without her knowledge). He takes his girlfriend to a Jonas Brother concert to trick her into blowing him and knowing she loses control of herself.
I thought he would qualify but I can see how bad he can be at times, but not on the same level as Peter and Stan. So I kinda have to agree he’s sometimes brutal to be on this wiki.