...stale after five minutes

http://www.vulture.com/2018/02/our-cartoon-president-showtime-review.html

The Showtime animated series based on The Late Show cartoon, which formally debuts on Sunday, feels “remarkably tepid” following the release of Michael Wolff’s Fire and Fury. “Jokes about Donald Trump tend to feel fresh for only about five minutes, until the president himself sinks to a previously unimaginable low and provides the Twitter meme assembly line with a new product to repackage,” says Jen Chaney. “Even that is a form of recycling.”

ALSO:

It manages to be mean and toothless at the same time (https://www.nytimes.com/2018/02/09/arts/television/our-cartoon-president-review-trump-showtime.html)
Dubbed-in references to Stormy Daniels and “sh*thole” countries make it feel stale, instead of fossilized (https://www.hollywoodreporter.com/review/cartoon-president-review-1083328)
Our Cartoon President views Trump as if he’s Family Guy’s Peter Griffin (http://variety.com/2018/tv/reviews/our-cartoon-president-stephen-colbert-showtime-tv-review-1202692370/)

Not surprised. I, like many others, find Stephen Colbert to be an unfunny washed up has been at this point. He needs to give up the political junk and go back to his "Strangers with Candy" days.