If someone tells you they are a horrible person, are they usually right about themselves?

In your experience, if someone says that they are a horrible or bad person, are they usually accurate in that judgement and they really are bad? Or is it nice people who tend to self-reflect and judge themselves harshly and say they are bad? My friend thinks that people who say they are horrible are usually the nice ones. What do you think?

If someone tells you they are a horrible person, are they usually right about themselves?
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