I absolve you.
You’re right: Mediocrity is the secret curse of the Establishment. The Establishment consists of people of mediocrity: mediocre intellect, mediocre integrity, mediocre standards, mediocre morality. They are baffled by a man of genius, truth, excellence, and puissance, viz. President Donald Trump. They simply cannot understand him, and they are particularly confounded by the way he dances circles around them and the magnitude of support he receives from people of high intelligence, morality, and honesty, i.e. the basic American man and woman.