What the fuck is up with some authors bro

I read non zero sum years ago and oh god it was horrible, now anyways to the plot I've seen this happen in two series. Basically this guy gets raped 24/7 then oh boom he escapes but he gets into an accident where he lost his memories and so he's back with his abuser... why do these plots exist? Like why do the authors always let them end up with their abusers in the end each time?! I was so happy to see in TT an edit of the guy finally escaping only for someone to say "hey so this happens... " What is up with that