I very nearly disowned my mom. She was verbally and physically abusive to me, and only me, throughout my teen years. My dad left her and I was the oldest male. So I reminded her of my dad and she took that out on me.
Her greatest hits include trying to rebreak my wrist just after I got my cast taken off, and throwing a metal folding chair at me on Christmas. She usually did these things just before threatening to call the cops on me, or threatening to have her dad come pick me up and take me to live with him in the ghetto, where her parents still love to this day for whatever reason.
In the end, she never apologized. Even my dad, who is almost as emotionless as a Vulcan, later apologized for spanking me as a child. My mom still won’t even admit to what she had done. But it is ultimately much more effort to disown her than to just deal with her.