FM, I recall the same issues with my ex. She absolutely refused to co-parent and then flip-flopped all over the place with information - both drowning me in it and withholding it. We're currently back to her withholding it
The stress on the kids is a lot. My kids ended up going to the therapist at the insistence of their mother's lawyer. I'm not going to say I caused that lawyer to do that, but there were a few things I had my lawyer suggest that "helped" that team see it as their idea
My ex is similar to yours in that she flat out refuses to co-parent in any way,shape or form. And of course, blames me for that lack of co-parenting. Par for the course.
I mention that so you don't feel like you're the only one. The difficult part is getting the kids some help and doing what needs to be done regardless of what the ex does to try and stop it. But it's well worth it for the kids.
I'm sure you're doing everything you can to help them. I hope some of these ideas is something that helps you find that you're not alone and that helps you find a solution that helps your kids.
Good luck, AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."