The narcissism traveled to my brother

My mother is a textbook narcissist. She never wanted me from the moment I formed a personality wildly different from her. She wanted a clone, and I was anything but. She has screamed in my face that I ruined her life more than once. My brother, who is three years younger, is a vile, mean, nasty person and my mother worships him. He was so horrible to me growing up and my mother blamed me every time for "instigating him." I've cut off my entire family as much as I can (luckily I have an amazing partner) but I'm so conflicted because my dad is quite elderly and nothing like my mother. Anyway. Glad to be here.