Sick of my sexist mom and my 30 yo brother living with us

He throws tantrums at everyone all the time and its exhausting. Hes made everyone in this household cry, shouts at everyone, insults them, broke a hole in my door, and so much more yet my mom continues to let him stay here bc “he’s getting better” no tf hes not hes just moved his anger from her to me and my brother we get all the heat so she doesnt care and justifies it.

Its clear hes her favourite and im her least cause im the girl. Im sick rn and i just got back inside after HE LOCKED ME OUT THE HOUSE FOR 3 HOURS IN THE MIDDLE OF SUMMER and she manages to get mad at ME?! She justifies all his terrible actions yet she describes and acts towards me (to my face) like im some evil bitch its so disheartening and just aggravating. She doesnt even pay attention when i talk and she just finds a way to bring up my brother in our convos.