Why do people not accept vindictive mothers exist and automatically assume the father is a bad person for not being able to see his kids?

Yes there are shitty fathers who deserve not to see their kids, but at the same time there are good fathers being kept away from their kids because their vindictive ex is using their kids to cause emotional abuse, which doesn't just affect the father, but the kids as well.

Why do people not accept vindictive mothers exist and automatically assume the father is a bad person for not being able to see his kids?
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