@cm0308 Make sure you're getting as much child support as possible. Have an open case, if the office isn't enforcing it, call them monthly. The squeaky wheel gets turned with that department.
There's no shame in public assistance including food banks. Take all the help you can get .
A lot of churches, especially larger ones will help out single families or low income people.
There's nothing wrong with having more than four children or a blended family but until you can catch your breath, I would get on some very sure fire birth control of you're doing any dating at all.
That my ex is out there living the good life without responsibility also drives me up the wall. I only have the bare minimum contact with him. Only about the children and only when absolutely necessary. I do not follow him or mutuals on social media. When family would try to give me updates about him, I would shut it down and say I'm not interested.
When I'm especially struggling I tell myself, even if I think it's lying at the time, that right now is a rough point. That everything looks dark because right now is a bad time. That it won't always be this way, that I just can't see it while in the thick of it