idk, I just see it as Hiro not actually being destined to slay her. There's a hint from Catgirl who says there's a prophecy of some kind, but she says forget it as it probably isn't related to Hiro. So, Hiro defeats the last boss, but can't end her. And... he just makes her life difficult coming to her multiple times and beating crap out of her. And when he does, her servants are so scared they make a feast for him so he won't take on someone else while their master is fleeing.
It sounds pretty funny, and it still counts as victory for me, even though this isn't the end. Yes, you have to get there first, but it's very possible if you start walking and building up strength right away. Even with companions. You just need a few failed runs before that, which aren't really failures, because 1) you collect achievements, 2) you can play different scenarios, explore the game, and do what people do with sex games.
Like, I don't see the game broken the way it is. It sure is in the middle of beta, but it's playable and enjoyable.