It's possible that you're projecting your own feelings onto them. Psychological projection is pretty common. In this situation, it would involve you projecting your own hatred of yourself onto your family, and interpreting that as them hating you. This is just a possibility to consider. It's possible they really do hate you, but that assessment would require evidence. One angle to consider this from is, how would your family behave towards you if they truly hated you, and is that how they treat you now? This isn't an assignment, just some food for thought.