Are other stepmoms as annoying as mine?

Well, you know how to avoid the punishment, don't make snarky remarks...but you won't learn because teenage girls would rather think the world is against them for reasons unknown. I'm sure your SM would much rather get along with you but you just have to push her, don't you? Next time, shut your mouth and go to your room. It's more effective and winning to show pive disapproval to an authority figure than to get all up in their face and force them to retaliate.