Tilted
..
I would be if I had to listen to that.... for myself
Fortunately he doesn't have to listen to that if he doesn't want to. He can pack his bags and be on his way. Might there be lingering consequences of his relationship with her - e.g. divorce proceedings, alimony, who knows what? Sure. But that's the price he pays for having made a bad choice in who to marry. That's how we evolve and improve, we pay prices for our mistakes - both individually and collectively as species - and then, hopefully, learn from them.
In olden times people might die for having made no bigger mistake than eating the wrong color berries. He should consider himself lucky. But to the extent and for as long as he chooses to remain in the relationship, he should avoid acting like a douchebag or people should judge him as such when he does so act.
I don't care how badly she acts, he's still a douchebag if he acts like a douchebag.