I can relate. That happened with my Stanley Parable CHYOA I was trying to write. (It flowed so smoothly from basic priors, but it ended up a LOT darker than I wanted it to. Mostly because the characters are trapped between a Mind Control corporation and a petulant god, and then I threw workplace harassment and sexual double standards into the mix. In retrospect I'm not sure what I expected.)
Anyway, have you tried inventing characters who are less cruel?
Or, failing that, pitting the sadistic assholes against equally cruel characters, so that from the reader's perspective, they both read as Acceptable Targets who Deserve Each Other?
You should actually make a story called "Joke's on you, the rape is legalized," just make the introductory chapter, end it with the question "Who are you?" and then just make it public and walk away.