can you move out, distressed? your mom is a very unhappy, miserable, angry person. she projects that on you.
if you can't move perhaps when she wants your input re her many conflicts i would reply with, "mom i wish i knew the answers to help you, but i don't." she will try to suck you into a verbal exchange, try to push your buttons...but don't buy into her unhealthy behavior. just repeat the above statement every time she does this. she'll be frustrated, yell at you but just detach yourself from her. she may never stop her unhealthy behaviors but i'd use the same sentence everytime she attempts her manipulation on you. it's called "tossing the basket ball back to her" in therapy. i mastered this approach and assure you it works. any normal, constructive approach with her will not work. i know you know that based on your experiences with her.
if she calls you stupid i'd reply, i'm sorry you feel that way about me. then say no more.
i really hope you can move out. your life will improve, you will gradually make friends, and reduce your stress level. i hope my suggestions may help you. you deserve a meaningful life. what say u?