I think the problem was that he has always taken her for granted.
I don't disagree that she is acting out of anger and despondancy but it is understandable the level of pain she is experiencing.
I've known quite a few couples in the entertaiment industry and within those spheres there have been some extraodinary talented, gifted and creative people.
Most have one half on the relationship that nurtures the other, a supportive role that helps their other halves and stands by them as they watch their star ascending. It takes a great deal of inner strength to watch a partner bathe in success whilst the other partner watches from the wings.
But... in many cases those stars appreciate the support they are given, in the words of Bette Middler "you are the wind beneath my wings".
There is a certain respect and deference given to those who take a back seat, the families are usually thanked.
It doesn't seem to be the case here though, he has provoked her with his absolute disdain by ignoring her and treating her with contempt. The respect as the mother of his children and her public image seems to have been disregarded.
He's not keeping a dignified silence, he's using others to fight his battles to humiliate her and drag her through hell, he's totally ungrateful and probably always has been.
He is a coward and hopefully, now she has burnt her bridges she will see he never deserved her support, good luck to him finding the same support from someone who was willing to rip a family appart.
I've got a feeling he's going to learn the hard way.
All this destroying of her reputation, mental health and winding her up will I fear sadly backfire on him.
Don't shit on the people who helped you get where you are.
An egotistical fool.