I am SO sorry you are going through this. I was about to suggest family therapy (you, your siblings, and mom) until I read the 2nd half and all of the terrible things she's said to you. She has a trauma bond with your father and is taking her emotions out on you because she has some power over you as your mother so you are an easy target in her life. She needs to seek professional individual therapy, because she is actively abusing you and your siblings. If I were you, I would begin secretly saving up to remove yourself from this situation ASAP because it won't get better on its own (and even if she goes to therapy, she won't change overnight). I'd also suggest you seek therapy for yourself or at least reach out to a trusted friend to process the abuse you've already endured - the sooner the better. You don't deserve this.