My father is very abusive and does not miss an opportunity to belittle me. I do everything he expects of me but I am really worried about how much more I can take. What should I do?
No matter how bad, abusive and insulting your father is, you must tolerate and behave well with him. He is not worse that a Kafir parent, and we read in Quran and Hadeeth to treat non Muslim parents nicely and talk to them nicely.
Never alter a word which can make him unhappy.
Be patient and tolerant whatever he says.
Your reward will be great iA.
Wassalam.