i wanna get revenge

there was this guy who manipulated me (and several other mentally ill girls) and left them once they got attached

i made an alt account just for the purpose of getting back at him by turning his friends against him, as im seeing they don't really like him either. he takes pride in ruining mentally ill girls further by making them believe he cares and then leaving them, and then says "i don't do it on purpose blah blah" like he isn't almost a full grown adult who can SURELY realize what he's doing is causing harm to people around him. i already got two on my side (i hope). i just need to get this off my chest