Why do some moms take away and make false claims against the father of their children?

I understand a lot of woman are angry and bitter and full of hatred when they get divorced and then they make the father life miserable by making sure he never sees his kids. Are woman that heartless? Make your kids lives miserable because your an angry bitter baby momma who has to work instead sitting at home or maybe work on the relationship at least. Im glad im not one of those woman.
Why do some moms take away and make false claims against the father of their children?
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