How on earth can he blame children? This shows how immature he is.
My ex was the same- he used to tell friends he had ‘no problem with me, just the kids’ – and they were his own kids!
He looked at me confused one day when I reminded him that he was the adult, they the children.
These men aren’t equipped to be parents. They are too self-focused.
Did he have a bad relationship with his mother, by any chance?