So what are you going to do to change that then? Because all it's done so far is give you anxious children and cause you resentment....
I've been a completely single parent since my children were 2 and 8 months old. Their 9 and 11 now & both disabled. I don't receive any financial help from their dad either, everything is on me. I have a babysitter, it's nice to go out once in a while.
Your negativity will rub off on your children yano 🙈
Nothing will change unless you do somthing about it
Stop wasting your time being angry at your ex, if it's taking this much of your mental energy up and making you so resentful of your life then you need to fix that pronto, get some counselling of some sort, somthing
Nothings going to change unless you make it change
Edited to add
I get angry somtimes when I think of my ex, he really hurt me, so badly that court ordered no contact for me and the children, I've raised them on my own for almost 9 years and he's swanning off on holiday all the time
But I'm the one who gets to make and keep memories with my kids, their happy, they both love me, their kind, generous, funny, outgoing,
I could easily be negative everyday if I chose to be, I've a lot to be negative about. But whose suffering if I'm not in a good place mentally? Just me and my kids, not their dad
You need to sort this out it sounds awful for you and your children