@FullTimeMummy1983
I'm at a loss to understand your thinking here. Pretty much every poster here has said that what your Ex gives you now is for your children - not YOU! He doesn't owe you any more than he is currently paying and, if I've understood correctly, he's been generous as far as the house is concerned.
We had a mortgage but he didnt take anything from that cos it's the kids home so now its just in my name.
Plus you mentioned you have an inheritance.
You cannot block out common sense by digging your heels in, or burying your head in the sand, or sticking your fingers in your ears and yelling your frustration to the world. NONE of that will help you. YOU, the other adult who had these children, are responsible for ensuring the good welfare of your children. NOT just your Ex. Certainly not his wife because your children are NOT his children and she has neither the legal nor moral responsibility to pay for children who are not hers.
The fact that he decided to divorce you doesn't change the facts as they stand. NOBODY owes you a living OP. You have to please get off your high horse, stop with your irrational and entitled demands, and make the best of it. What else is there - realistically?
You are already in a better position than most. You have an Ex who's taken the emotional and financial needs of his children seriously, you have a house over your head, I read nothing in your posts about you having a mental or physical illness so REALLY why would you expect someone else to be your lifelong meal ticket when you are perfectly able to go and get a job?
I've no doubt that, after more than a decade of being out of the workforce the very idea is daunting but you absolutely cannot live like this for the next 40-50 years or more.
You've had good suggestions on here about the next, positive steps to take. Swallow your pride, if not for your children's sake then your own, take the advice and go from there.
I hope you make the sensible decision OP because the only person who is going to rescue your future is YOU. I hope you take the good advice you've been given to plan and work for a better future for yourself and your children.