STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT! STOP IT!
You are building up one hell of a head of resentment for something you simply cannot control, cannot change.
YES - you know he is going to hurt the kids emotionally
YES - you know his priorities are screwed
YES - we get it, we really do!
BUT you are going to have to let go of it and concentrate on NOT ADDING TO IT by harbouring all that resentment.
You are fixated, from your posts here, on all the shit things he has done. FUCK THAT! COncentrate on the good things, he is no longer in your home, in your bed, bank account and daily life. Now you just have to release him from your head. As that interminable song says LET IT GO!
Your last posts suggests you really are in a place of contemplative misery right now. 
But you know that all the 'whatif' ing in the world won't change your life right now, but looking for and focussing on the good bits, the small every day joys will.
Change your head, Tracy - look for the small pleasures and fuck the rest of it!