I agree with Myzen that we dont know the whole dynamics of the relationship Miss A has with her mom.

Punching isnt a good choice for what happened. I dont like being made to be hugged when im angry either Miss A and it instills in me the flight or fight response as well. Id suggest going with the flight response next time Maybe you can tell your mom that while you appreciate her hugs that when your angry her forcing them on you isnt a good idea. I dont think forced affection ever feels good and so while your reaction to it wasnt the best choice, i dont believe it is all your fault. And you are definately not "bad".