its not about her admitting it, its about her hearing what it does to you,and about her coming to recognize the wrong in it. This is not a healthy environment. If you can, get invited out for shabbos to friends, relatives, whether for a meal or to sleep there. Spend your shabbos afternoon at friends at least.
It’s not something to lightly dismiss. Ask a rov and/or a therapist for advice and help. and do NOT allow your mother to grab your shirt or chas v’shalom hurt you or throw soomething at you. That is not part of kibud av v’aim.