Yep, loved becomes past tense sometimes, suprisingly it does not have to become hate, avoidance or even distaste perhaps, but not hate. Hate gives them to much power. Why waste your time and energy over something that would be better filed under lessons learned.
Sometimes it is not easy and when kids are involved it becomes harder, sounds like Filthy Sanchez's cousin was a very prudent man and he got the last laugh.
On the other hand I heard of one rather nasty bit of petty spite that made me snicker. A young woman split with her boyfriend and decided that she would be unkind. Before leaving she sewed several raw shrimp into the valances of the curtains all through the house. EEEEWWW!