I hate them

I hate my in-laws (well, in-laws to be). He is a horrible person. He is mean and nasty to his family and his wife. He is an awful man. She over reacts and always makes a mountain out of a mole hill. The sister is a bitch and she's so immature. She gets jealous that her brother spends time with me and wants him all to herself 24/7. They all treat my fiancé like he's still a child and they all don't like me. I'm at a loss