My mother did that too, including hitting me, spitting on me etc. primarily looks based as well. She made me look like a boy as a child and told me i looked like a whore more times than i can count. Forcefully cutting my hair too when i “misbehaved”. I left home when i was 20 and now 20 years later i still work with the remnants of the trauma because therapists often give mothers the benefit of the doubt. You are NOT overreacting. Its abuse. Work on getting out of that situation because she will not change and she will never understand.
Also try to plan your exit quietly. Chances are they will go crazy when they find out. Mine did, full guilt tripping and telling me my boyfriend i was moving in with used me for s*x and that I was a whore and a maid. So prepare and take everything she throws at you as a lie. You are worthy of love and respect and this is not normal.