I totally understand. I am in the same situation. I have a really bad relationship and they have been pressuring me to quit too. I just want to get out..I tried to get a change but the college won't facilitate me now as I am through my 3 years. I would love to change uni and supervisor as I just want to finish. I have written all my chapters but they keep telling me its not good enough but haven't given me any reasons or help. I feel like quitting but I have come so far..it would be such a waste..Just know that you are not the only one who has this problem. Don't quit..