Hmmm -- is it possible that your father has always been this way but it is has now gotten worse since you have started to fight back? Fighting back seems like a normal coming of age thing to me -- we get to a point where we want to be independent of our parents. I think the closer you are to a parent, the worse the struggle for independence is.

I'm sorry you're dealing with this. I ran into similar problems breaking free from my mother, in terms of her turning anything I said against me somehow. I found that it was just easier for me to give her basically no information she could use against me. Not sure if this is the case for you, but I let my mother sort of substitute as a friend. In hindsight, I wish I had spent more time actively seeking out friends.

I do think that it is very wrong for your father to say that you are evil, don't care about him, etc. All that strikes me as verbally abusive and I could see why you would have trouble concentrating. Yes, he has health problems and may be stressed out, but those are pretty bad things to say. Are there any sort of academic support services at your school? Tutoring? Study groups? Counselors who teach study techniques?