I don't see how anyone could blame you for how you feel, nor could they say you didn't give it your all. I remember so well when you first arrived here, and I you have been through so much pain.
I feel like you are an old friend now, and I'm hoping that we can still hear from you (if it's not too painful)and let us know how you and the girls are doing. I believe you have so much wisdom to help others. But I certainly understand if you decide that you need to move on from the board.
Isn't it amazing how she is trying to stay in the house and get you to leave? Guess she thinks it will be better for the girls if she stays there and daddy is the one who moves out? You are a fair and respectable man, and you will do what is best for your children. She isn't being fair or responsible....not even very normal. She's in a very scary & selfish place right now. She's using the kids,but it's really herself she's thinking about. Her fantasy has every decision so clouded that when everything breaks and she finally sees what she's done.....it is going to be really bad for her....and maybe bad on the kids. You might want to consider some type of C for them later,if/when she gets too far out there.
Oh, just breaks my heart. So sorry for all of you. Hope you will let us know how things go, okay?
((hugs))
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!