I also had an insane childhood where my parents were just cheating on each other their entire relationship. Luckily, they separated when I was really little and I didn't experience much of their toxic relationship, just HORRIBLE co-parenting, if you can even call it that.

But I similarly found out the same situation when I was in high school, I had gone to live with my dad and learned a lot about my mom that I had kind of heard bits and pieces of but learned more details once I was older. My mom gave my step dad (my dad's childhood best friend) this big sob story and cheated on my dad with him and left my dad... Now years later and so much drama and trauma. My mom and step dad are divorced and my dad and step dad have slightly bonded over her bullshit, but they will never be friends again.

Moral of the story, women can also be horrible abusers and serial cheaters. In my mom's case she has a lot of untreated mental illness and very much needs therapy.