that sucks, dude. tbh sounds like your aunt is mentally ill in some way. having a mentally ill family member can be a huge burden, especially when they do shit to hurt other people. my brother seems finally to be stabilizing (knock wood) after 11 years of being completely out of control and, once he got fully grown, scary to be around. but i can't tell you how fucking angry i was at him sometimes for how badly he treated my parents and for all the shit he put them through -- stole from them, threatened to kill my dad, overdosed in their house, got arrested multiple times, got kicked out of god knows how many programs and facilities that they busted their asses to get him into, and on and on. and my grandmother (mom's mom) has transitioned to hilarious-old-lady mode, but she was abusive to my mom and her siblings when they were growing up and my aunt is convinced she tried to kill my other brother when we were little by swinging him out into traffic while we were waiting to cross the street.
i don't have any advice really, just saying i understand why you'd be pissed off and i hope y'all figure out a way to deal with your aunt.