How about I'm thinking of responding to one of my ex-wife's texts with a reminder that I hate her. It makes me happy and I have zero guilt about it?
I'm trying to understand why you would say that.
Revenge is what's keeping me alive. I live for these moments of making her miserable.
Your wife seems to have hurt you in some way or form. This way of communicating your hate to her is not going to solve your problems, toss that idea into the trash now. Put this passion of yours for something negative into something positive and your life won't seem so bad.
I don't want to let this go. She deserves to be miserable.
I'm sorry that you're still hurt about what happened with your ex-wife. However, being verbally harsh with your ex-wife is wrong and will not help you to feel better in the long run. It would be best to say nothing until you have healed from the situation.