A Word To The Wise
An insufferable lout becomes a national celebrity and proceeds to destroy himself and everything and everyone around him.
This is after he flies nonstop around the world. Think about history with Charles Lindbergh. In addition, a short intro to the story by Henry Fonda.
Jack ("Pal") Smurch has become shorthand for a hero, politician, or celebrity who, in person, turns out to be a lout or a stupid, rude, awkward person; a clumsy, ill-mannered boor; or an oaf.
Everyone who knows him knows what he's like, but everyone is reluctant to say anything about it.