You are a person of value and you have a rightful place in the world. Stick with your job. Take what good you can from what your manager said and make what changes you can to get along better with the team. You were right to tell your manager you didn't like her saying "do you have a brain?" and I am not a bit surprised she got angry when you called her on it. That tells me she knew she was in the wrong and she probably didn't like you creating a paper trail. But she is unlikely to admit it. Ever. If she says something like that again, calmly answer her immediately, in front of others: "I respect you. Please show me the same respect and stop saying that." No need to cry or raise your voice. Some people are uncouth and don't have proper manners and don't care to learn. I don't think that means we have to swallow all their crud. I work among some horrible people. I plan to find another position but until then I'm staying because I need the money. I think you should stay until you can find another position. Don't let one ill-mannered manager drive you out of your job. Courage!