My ex is letting our 2 year old play grand theft auto

So last night I’m putting my daughter to bed when she makes a “gun” with her finger points it at my head and goes “gun” and pretends to shoot me. I called her dad.

He told me that him and his 9 year old son (who has so many behavior problems, autism, and a lot more stuff) play GTA. I know they play extremely inappropriately (shooting people, robbing people, cussing, and picking up hookers). I told my ex that I do not want our daughter around when they are playing because she is two and that’s extremely inappropriate.

He went off on me telling me that “she’s a smart girl and will know it’s just a game” and “if we can’t play GTA when she’s around then she can’t be around while you watch grey’s anatomy at home”. I was floored.

He has displayed he’s a bad father to his son over the years simply by how he raises him and honestly doesn’t give an F about any structure rules or anything in regards to raising good humans. His son also got in trouble many times for pretending to shoot people at school. So now I’m at a loss. I’m more upset that he doesn’t care at all about my concerns and doesn’t see what’s wrong with his thought process.

What should I do? We do have court papers stating she goes there every other weekend.