When someone hates another person to the extent this woman hates her ex, she really only hates herself and is projecting self-hatred onto an easy target. In fact, I am sure that it was her self-hatred that caused her divorce in the first place.
I believe that the ex-husband’s only crime was not having enough self-respect to avoid becoming a victim of bullying.
This woman is a typical bully, her ex is a typical victim.