I am so sorry that you have an uncle who treats you so badly! I had an aunt who would pretend to everyone that she cared about my sisters and I but treated us sort of like your uncle treats you. I finally grew up and had enough and told her exactly how I felt about her. I then refused to be anywhere that she and her husband were regardless of the reason, holidays, family gatherings after funerals if they were there I wasn't. I just waited until I could enjoy my family without them and the family understood. Some of them even chose to stay away with me. Your uncle is a bully because they choose to let him get away with it. If you choose to stand up to him make sure you do it in public as he is less likely to get physical. Otherwise just stay away when he is around.