Will God hold me accountable if I separate from my father, knowing that I will not cut off communication or anything he asks for, and will God hold me accountable for not loving him even though it is not in my hands?

You are not to blame for hating your father in your heart due to his bad actions, for Islamic law does not hold one accountable for that over which they have no control, in accordance with the Almighty's saying: "Allah does not burden a soul beyond its capacity." However, one must be careful not to cause any harm through words or deeds, as this is an act of disobedience to parents. There is no harm in your separation from him. Seek Allah's help, remember Him often, ask Allah for his guidance and repentance, and request scholars and virtuous people to advise him.