He's baiting you and projecting onto you. Don't respond right now, I'm sure you are PO'd (I am.)
Remember this is hardball. He left his family, he hasn't been financially supporting you and hasn't been seeeing the kids. He has no idea how bad this will look in front of a judge. He loses across the board if he starts to fight and he knows it. He's trying to bully you.
I have some ideas just get to a place of calm first.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.