My mother incited my brother's suicide

I've struggled years of trauma from my mom, and I resorted to weed to calm me down when in college to numb my pain. Unfortunately my brother stayed with her and earlier in the year she told him to hang himself cause he failed his college courses, he then failed again, and before anyone could find out, he took his own life. The family says she's not guilty, that "she was just angry and what she said didn't matter". I'm so upset, so sad. I lost a lot, my father left me after finding out I smoke, he was never really present, just financial, my girlfriend cheated, very badly, with multiple, and everything is falling apart.

I live with my aunt now but my mom is annoying me, she took my phone, and they put me on antipsychotics cause I told them I smoke to take away my anxiety and trauma, and they just think I'm crazy.

I hate my life, there's nothing I have anymore, no friends, no parents, no one. I'm so hurt. I don't even feel the pain anymore. I just feel numb. I can't even mourn my brother. They're making my life hell.

Don't know what's next for me.