It's ok to vent..... I am so sorry to read about your physical abuse from your Mother
Seems like she is living in denial of that physical abuse and now she has carried over with severe verbal/emotional abuse......
I am not in your situation but I would consider her very "toxic" and not worthy of your company in any way shape or form until she has apologized and tries to make amends for all the abuse she has dished out to you.
Please make sure you are around people that see your value.... that is what you need right now.
Vent all you want...you deserve it!
Codeblue