The thing is, most people know their limitations. Some deny them. Some work hard to overcome them. But most of us know what they are and simply work around them.
Biden has to know that he is a moron. He must know that he is a bumbling fool about everything he does.
Hopefully, he recognizes that someone, anyone, would be a better advisor to the president than he is.
With that knowledge, he can relax and just enjoy life.
Tom in TN