You sure need some hugs! Life overall can be tough, many bumps along the way and you sure have more than your fair share. I do try to post with tons of empathy but I'm also known for being a bit of a logical poster so I'm sure others will post here with even better responses.
Counseling is good, not just for you but also the children. I noticed your post was a bit more frazzled than your prior posts so getting a referral to counseling was an excellent next step. My lawyer told me early in my divorce case that "court loves counseling". Counseling is good!
Recovery is a process, not an event. You will get lots of encouragement here but the fact is that you will be stuck with the struggle to recover. We here in peer support can encourage you but our words need backup, the resources a counselor in person can surely provide for you. You can't relinquish
your goal for your life to get better, that "light at the end of the dark tunnel".
Your pains in life may be situational. By that I mean that your distress may be less internal caused than caused by external issues such as a poor marital relationship and lack of support from your children. While it would be great if that could turn around, there's only so much in your power to change the externals. You can't make your husband work side by side with you. You can't force your children to be more supportive. So... what can you do to improve your situation?
Accept that "it is what it is". Then focus on improving what is in your power to change. Misery over your situation is natural but it's not much help, right? It stinks. So if there's little that can be done to change your (separated?) spouse or your children which seem to be taking the easy route, then what's left is working on yourself.
A good first step is finding an experienced counselor. (And it doesn't have to be the first counselor you meet. It's okay to visit other counselors if the first doesn't fit your needs or have the experience with what you're dealing with.)
Admittedly, it's tough to "lift yourself up by your bootstraps" when you're in such distress. The task is monumental. But by taking
small steps to make improvements, one after another, then
over time you can gradually make surprising progress. You won't notice life is getting better until you look back one day in the future and are amazed how much progress you've made.
You are NOT alone. In your distress you naturally feel stuck in your problems. Your spouse and the kids aren't supportive. Understood. Still, it's up to you to take charge of your life, to the extent possible considering your situation and limitations. Start small and build on that. We're here cheering you on toward recovery and a better life.