Not sure I have anything hugely constructive to add.

Just wanted to say I have been in a similar situation (although I was in my late teens/20ish) and was a troubled young woman at a stuck point in my life - my father in particular was incredibly frustrated with me and one occasion did hit me (he also had stresses in his job so outside factors). I knew I needed to get my life together but him shouting at me and hitting me did not help one little bit, in fact it sent me even further down a spiral.

Note I am not blaming my father, but certain reactive behaviours are not helpful encouragement, it is harder to get yourself together when people around you react like this.

I did eventually get through that dependant tough time, and my relationship with my parents did improve. I love my dad to bits, and although I have seen his temper a few times since in adulthood, it still has an effect on me now. My therapist advised me that I needed to remind myself I was not that helpless child/young woman and was stronger than that now.

Wishing you lots of strength towards a more independent life, if you can work towards that I think you will thrive.