A person approaches you and screaming that he is negligent and has no idea what he is talking about. Such a behavior, nothing but a smile will stir you up.
Well, behold, any accusation that you receive from another person is only the reflection of his inner state. If that person did not have an internal conflict, he would not even notice you.
Someone will always tell you what is bothering him / her personally. And that might have nothing to do with his interlocutor. In any conflict, one person will accuse the other of what he does not like or what he can not accept. The accusations are not about you, the accusations are about it. Communication with you has revealed these shortcomings.
In any conflict, replace “you” with “me”. Smile. It’s as if the person is accusing himself in public.