FIB I know you have have a long, hard 4 years, but as someone else wisely pointed out, it was 4 years in the house with your kids, and that is priceless. Your D went from 2-6 with you there. That is crucial, because if you had been gone when she was 2 she would have no memory of ever having lived with you. I know that going forward away from your kids will be difficult, but staying with your X would have been more difficult. Now you will have hte freedom to continue the loving relationship with the kids withut her negative impact. Blessings as you go forward.
"You can't stop the waves, but you can learn to surf." Jon Kabat-Zinn
