Being a manager does not mean you are correct by default. It does not mean you cannot receive feedback from your managees.
Also, a brief refresher: lying about someone is defamation. If you defame people's performance and cause them to lose money you are personally liable for damages.
We should sue managers more, when they indulge in bad habits such as lying about performance and making false accusations.
Some managers realize that their opinion is authoritative truth and abuse this to fork reality, creating a psychopathic fiction where everything they say is true.
We should sue each and every of these entitled tyrants.