I don't know what my kids have left now.
What your kids have left is a future of possible freedom from people manipulating, harassing, and deliberating wounding them. I know it sucks to lose the bulk of your family - but you "lost" them a long time ago. You may never have "had" them, really - at least, you may never have had the loving family that you wanted.
Healthy boundaries (and the right to stand up for them) are one of the very best gifts you can give your children. And you can add to it by making good, healthy friends that will become your family of choice, instead of living your life suffering at the hands of your family of origin.
I'm so sorry it hurts so much. =(