Living with a mother i despise

Anyone else have a mother that they dont get along with or just literally despise her as a person. My mum has dragged me down all my life. Made me feel so unworthy, so belittled. I have no confidence. No self esteem. She dosnt want me to be happy. Anytime i find anything that makes me even slightly remotely happy she runs it down and drags me down. She is so selfish, so materialisitc, and tries to force my dad to take sides. She acc believes she is so perfect and has zero flaws. Making comments like, "im more of a christian than any christian out there. I dont do wrong. I dont hurt people and have only been with one man". She is all about her. She wouldnt think twice to ask u how u are. But will yap about herself and her problems allllll day long. But if you are depressed its how dare u do that on her and put her threw that. What about how u f**kin feel. I am permanently miserable. I really need to break off her chains and find my own happiness. She has everyone in my family dance to her tune like little puppets. And if we dare even say boo to her she gets so violent and bates us. She has split my dads head open. Bate my brother. Gripped my up the wall by the throat infront of my friend. And ripped my hair out. And this is only because we stand up for ourselves and tell her what shes done wrong. Not one member of her own family even speaks to her anymore. All said shes unnaproachable. So last night she started to literally bate my little 12 year old brother. He was red all over, so because i said to her. Is there really a need for that isnt it a bit extreme she then went for me. And im pregnant. If my dad wasnt in the way i acc fear what would have happened to me. How do i finally stand up to this women?????