Problem is such a character arc would kind of end with her quitting the villain thing. No cynical d-baggery, no reason to be a villain. And sometimes it takes a while or a different writer to make a villain interesting - look at Mister Freeze or Kite-Man, neither used to be more interesting than a paper bag. So internet troll villainess could still work with either time or a different writer. It isn't a problem with the premise, no reason it can't work great, just a problem of execution.