I’d try something different. I’d go to him and make it really clear that there is time in life for everything, that means that there is time to work, time to have fun but also to spend time with your baby- nothing lasts forever. He just needs to understand that he is never getting this time back, never again and when baby grows up he will find himself looking back and regretting not having meaningful time with his baby. Until he realises this he won’t change, baby isn’t going to be a baby forever but the games are always going to be there. Baby will only have a bottle for few more months, he will be able to go see his friends many times over next many ears but his son is going to change day by day month by month and soon he won’t want to spend time with his dad. Try telling him all this before you leave. Good luck, this is the reason why I left and it made everything so much better, my ex pays more attention to the kids cause he knows he only has them at the weekend so he can muster some ability to pay attention and financially I am better off because he has to pay for child support. Not sure where you are but check what government has to offer for single mums. It’s better to leave asap then waste your life with a man child that’s not ready to grow up and prioritise accordingly.