What do I do about my girlfiends parents its impossible?

I have been going out with my girlfriend for 8 months now and her parents hate me and I can’t help but hate them too. They have banned me from the their house and I never get to see her now. Any time I do she just cries and says she can’t take it anymore and doesn’t know what to do. Her dad hates me for no other reason than I’m a boy and his little girl would rather hang out with me than their family. We did everything with them and always followed their rediculous rules about what was acceptable and what to do. I have always done everything to be nice to them but they still hate me. Her dad is a weird guy that has no job but tons of money or is rediculously in debt. He woln’t tell anybody where he gets money not even his wife. He is a horrible person that hates everyone is rascist like crazy and gets mad at everyone that doesn’t think he is amazing and the best at everthing. I have gone and helped him countless times; done whatever I can for him but he still thinks I’m worthless and nothing. Her mom hates me cause she thinks I’ll be like her dad and be bossy and controlling and ruin her life. I have done everything for her and just want to be with her. Her dad said he would kick her out and disown her a bunch of times for little things like being home after curfew which is 12 even though shes almost 20. I bought a brand new truck and said she could have it and I would drive my old one cause her dad would take her car for no reason. I found a place to live and said we could go there. She wol’nt go live with me even though she says thats all she wants. There are so many things I could tell you about how her dad is rediculous and hates me for no reason and all the things I’ve done for them but they still hate me. I can’t keep living my life like this waiting for a girl I love to come be with me. She says she loves me and she does but I have given up everything I do and time with my family to be with her and she woln’t do anything to come be with me and I told her I would take care of everything and we could get married and just be happy. Should I let her go or stay with and ride it out for something that might never happen.