More stepmom issues....grr?

Try sitting down and having a family meeting. If you call it then it will be impressive. And just try to keep in mind she's doing the best she probably knows how to do. Once your 18 you're out the door and us parents only have until then to prepare you for the cold harsh world waiting. You may not like it now but one day you'll see that yes you were just that important that she had to risk you hating her so you'll have a good life.