Was your mom always this abusive, even when you were a child or did this start after you moved back in? The rules she has set up are totally out of line with your age, but like you said as long as you are living under her roof you have no choice. I'm concerned that now it has escalated to pyhsical abuse on both your parts. It sounds like you are trying to follow her rules. You don't say what it's like when she is not on the warpath. Is abusive even when you haven't done anything wrong? I don't think you a bad daughter. I think you are having feeling due to the abuse she is dishing out. I don't think you are judging her too harshly, but still it's her house and until you get ready to move out you will have to deal with it, hopefully with no more pyhsical voilence.

You may at some point consider counseling to sort through your feelings toward your mom. Best wishes.