People with strong narcissistic tendencies and other dark personality traits tend to blame others for their own bad behavior. If they are lying, then they will accuse others of lying. If they are cruel, they will say that others are cruel. If they are stealing and scamming, then they will accuse others of stealing and scamming. They never take responsibility, and it’s always someone else’s fault.
Besides ascribing their undesirable character traits to others, they will attribute the good characteristics of others to themselves. For example, if they see someone being nice, they will say, “No, no, this person is not nice—I am nice!” If somebody is successful and happy, the narcissist will say, “That person is such a loser and a fake—but I, I am really successful and authentic!”
Psychologically speaking, this mechanism is called projection, and I talk more about it in my article titled 5 Ways Narcissists Project and Attack You.