My situation is nowhere as difficult as yours, but I understand your frustration when it comes to the kids. Coming from a disfunctional family I never thought I would put my kids in a similar situation, so I'm struggling to see why H (who also comes from a messed up home) would not be jumping through any hoop known to man to ensure our kids are given a better childhood than ours was. I also feel hopeless, and even though I cannot suggest a miracle cure, I just wanted to say that I hear you, and that we are all here for you.
I'm so sorry about what you and your children are going through, I hope the justice system can be kinder to you and the kids than your wife has been.
"There's nothing sadder than a conman conning himself"
“There is freedom waiting for you, On the breezes of the sky, And you ask "What if I fall?" Oh but my darling, What if you fly?”