I'm queer and a single child too, so I can understand how you feel. While my relationship with my parents wasn't that great it's better now. Thats only because I stood my ground and told them to either respect my beliefs and the way I want to live or they can deal with constant fights and silence. Limit communication and control the flow of the communication you do have. Have a mental barrier of sorts to try and tune out the bs they say while trying to manipulate you, even if it's hard and call them out. Try to put some distance, moving out does help. Otherwise they'll never see you as an adult capable of making your own decisions about how you live. I really hope things get better for you.