Please seek therapy if you feel that you must before going crazy. I grew up around mostly black people in Miami, so I can speak on what I saw. There are black women who have made the wrong choices in men and were left single with a child/children after the man leaves knowingly fully well that the man was not worthy of being a father. Being a single parent in general is stressful, but considering that women can be emotional some women took their anger out on their child. I've been on the train and bus and seen mothers cuss their kids out over little to nothing. I've seen mothers call their sons bytch, or say things like "You're just like your father. He ain't shyt" , "You stupid muthaf-cker" and etc. It affects the daughters too. I've seen some mothers take mistreat the child because they are not getting along with the father. A month ago I was dropping off my little niece at pre-school and a mother was criticizing her daughter for doing something wrong. She was saying something like, "Your stupid black ass....". Sometimes the woman may be the negative dominant role in the family. Those type of things cripple a child into adulthood.
If you feel like it's best to cut off your mother then let her go, or keep little to minimal contact with her. It hurts because a mother is supposed to love and nurture. From what I have seen mothers are "perfect" and can do absolutely "no wrong". If this was about one hating their terrible father then people wouldn't see anything wrong with it. Mothers can be terrible people. I have a good mother, but I have seen mothers do some evil shyt.