It wasn't working, he said why it wasn't working, they broke up, he moved on. Now that he is happy with someone else and has a new kid his comes out to publicly shame and demonize him... She was quiet all this time but now that he is publicly happy and building life goals with someone else who is more compatible, she does this to what, end his career, strain or break his relationship?

Hell hath no fury like a woman scorned but guess what, the best thing incompatible people can do is communicate it and move on. She should find someone or if she can't and it turns out there's something she's doing wrong, she should work on herself. This vindictive behavior is just going to make sure no sensible guy trusts her enough to date her seriously. Sucks for her but there's three happy people, Jonah, his girl and their kid so it's still a better outcome than him being stuck with his ex and both being miserable.