Being blamed for everything that goes wrong

Hello everyone.. I have always been a part of an emotionally abusive family and covid has been all the more hard because i cannot even go out anymore. My mother and my father always fight. I have an elder sister who is 31 years old and is still living with us without earning and doesn't even help us in the house hold chores. Whenever she does something wrong to me, the only response my mother gives is learn to adjust.. and then my mother starts shouting at me and blaming me every single time. She never says anything to her. Today my mother even told me that she wishes i was dead. I don't know what to do