I had one of these. I eventually stopped fighting for child support (I made more than him anyway). I never stopped him seeing the kids, but he only saw them here and there and at his convenience. If you were to listen to him, I'd be the devil incarnate. The truth is I wouldn't take him back.
That's the personal narrative. Legally, what men don't seem to understand is that support and access are 2 separate issues. Legally, they are distinct. Even if the woman blocks access, support is due. If she does, I'm not saying she's right, she's absolutely not, but that's when the father has to get his ass to court to fight for access.
Further, child support is a broad term. There's no obligation that the mother personally spend each dollar on kid x, y or z for their distinct personal needs. Support means support, maintaining a roof, paying the electric bill, internet, whatever goes into contributing to the lives of the kids.
The second I hear a guy disparaging his baby mama....I see huge red flags.
My boys are men now, 33, 31 and 29. Not one of them even speaks to their father. And before the fellas freak out...NO, I did not disparage him to them. I didn't have to, the years of neglect, of false promises, of Christmases with nothing under the tree from him but claims he'd "get them later," while he spend thousands on women....that was what did it.