Welcome back, soundofmusicgirl
I wonder if there's also some projection going on. I.e., when she says stuff like "You don't even really like the kids. You just want to hurt me by not giving me full custody", try switching the pronouns from "you" to "I" to perhaps get a glimpse of something she feels inside, but won't acknowledge: "I struggle with truly valuing the kids. I want to hurt you through them via visitation and custody issues."
I bet it's a brew of everything that's been suggested so far -- the persecution complex, being blinded by their hurt, seeing the kids as extensions of themselves, unhealthy and illogical thought patterns, and "my way or the highway" selfishness.