Well, I suspect my brother is a psychopath. He treats my mom like shit, in ways you wouldn't believe. He physically and verbally abuses her on a regular basis. The physical altercation aspect much less so than the verbal one; it's not to the point where he's bruising her or anything, just doing things like holding her against her will, slapping her and forcibly making her shut her mouth so that she cannot speak when she annoys him. He frequently tells her she's useless, fat as fuck, whatever names he can think of. Constantly questioning her prowess or lack there of in all aspects of her life. When he wants something from her, he hounds her till he gets it and shows no gratitude for anything.
I used to beat the fucking shit out of him when he did these things, but I no longer interfere with their fights because of that last sentence. She always gives into his terrorist demands no matter how irrational they are and no matter how badly he treats her because she's a failure of a parent. For example, just last week, she gave him $150 for Haruhi knows what even though she is currently already $500 in debt or more. Because of her constant enabling and making absolutely no effort to change his behavior or seek help for his very blatant psychological disorders, I have decided to step out because she obviously does not want any help or is maybe even oblivious to just how fucked up her son is.
As for my own relationship with her, it's always fairly horrible. I rarely speak to her because we have zero in common. All she does is watch reality TV programs and sit on social media websites. She still sometimes tries to talk to me about these things and my responses are always very callous. I used to feign interest to humor her but she one day told me that she saw through my horrible facade and I have not attempted this since. I do not know why she continues to speak to me, maybe she pities me.
I have begged her to help me help myself and provide very logical arguments such as "I have zero income and cannot afford to buy myself healthy foods, and on top of that I would not know how to prepare it, either" and "I cannot afford nor drive myself to and from a psychiatrist, a gym, a dermatologist, etcetera. You are my mother, I desperately need your assistance if I ever hope of getting anywhere in life."
It took literally breaking down into tears and begging to finally get her to schedule me an appointment to a psychiatrist. The results were lackluster; all the rumors I had heard about them proved to be correct and I left with nothing but a simple depression diagnosis despite my issues very obviously going well and above that. She laughed in my face when I broke the news to her, exclaiming "I told you so" and has refused to let me visit any similar self help establishments since.
I view this house as a prison.