In no way is murder ever appropriate of course, but I would speculate his wife divorced him because, “she wasn’t happy” and was sure fun, excitement, and (sexual) fulfillment was better on the other side. Her feminist friends probably encouraged her to divorce because she deserved to be happy. He, although not without fault, he likely got hosed by the courts and saw all his life’s work (house, pension, etc.) handed to his wife and her new Chad.
And now he loses his freedom too.