I am sorry to hear that you have same situation as me. Really hope that you can make through it as soon as possible. Please don’t quit, you will make it.
My story is more complex by now. Same as you, my supervisor keep pressuring me to quit without any good reason. Last week, he even filed a report “allegation of plagiarism” in the draft work on one case analysis that I hand in to him 4 months ago. He never gives me any comments on my work instead of it, such small part of footnote and quotation mistake is “Plagiarism” in his opinion, ridiculous!!! So, I have to defense this next week, don’t know what will happen.