What is her problem?

My baby's father ex is constantly talking about me and him on Facebook. She loves saying my baby's father is a bum, he doesn't watch none of our kids and she said that I'm stupid for being with him after knowing she put a PPO ON HIM for domestic violence🗣. He never did me that way, so I don't care. Lastly she mentioned how he wont let her see their child because he wants to make her look like she doesn't take care of her child. Like what the heck? I dont care what he does because hes not doing that to me.😑smh. I already know he cheated and don't keep money that's why he has me to take care of that for him. I told her it is not my fault he's treating her like this. That has nothing to do with me...😑 What is her problem?🤔