Just to add, b/c I think our posts crossed, she will blame you for all the problems of the world....as long as you act guilty. She has the kids the same amount of time as you do, right? Yet she tried to paint you out to be the bad guy toward her.
Cooperate with her (especially in co-parenting). Own your mistakes, but don't take blame for her neglect or downfall. Not to be mean, but for her own good and to help her deal with truth.
It is too easy for the WAW to just blame everything that's wrong on her LBH.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!