What does it mean when a girl blames you for her mental health issues?

I decided to date a girl and I ended up being the scapegoat for her mental health issues prior to the relationship she was exposed to child hood trauma where her parents would argue and best on each other. In one of her previous relationships she was sexually manipulated into performing certain actions which is rape but she wouldn’t acknowledge that for what it was she was still friends with the guy on social media. So fast forward to our relationship she’s abusive towards me in our relationship from the beginning I’m playing nba 2K22 with her and she’s losing and she hauls off and slaps me in the head I pause the game and say do I need to leave what the fuck was that. She immediately burst into tears saying she doesn’t know what came over her. Well this continued on in the relationship where she hit me again. I was bending over to pet my dog and she thought it would be funny to knee me from behind. She has bullied me for my ocd, any issues I have from my autism and when it comes to the physical abuse she says I bring it out of her and I have caused it

What does it mean when a girl blames you for her mental health issues?
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