Oh Jennifer, My heart goes out to you and the kids. Divorce is a shitshow when it's just you to worry about; add kids to the mix ad that makes it infinitely times harder. BUT! As the child of divorce, I can say that once you're through the messy part and get some healing (therapy, perhaps for the kids Iidividually and as a familyt?) I's so much better on the other side. My parents each found someone else who fit them so much better, and I had the benefit of having a bonus mom and bonus dad who I knew cared about—even loved—me. It suddenly doubled the safety and security I felt with me parents. It's not all bad.
I am wishing you all hope and healing!