The phrase "almost stupid" is correct and usable in written English.
It can be used to describe something that is very close to being foolish or lacking intelligence, often in a humorous or exaggerated context.
Example: "His decision to invest in that failing company was almost stupid, but he managed to turn it around."
Alternatives: "nearly foolish" or "borderline ridiculous".
"Cambadélis is not almost stupid".
"It seems simple and almost stupid," Probst continued.
You need something so fundamental to the game that it seems almost stupid to point it out.
Between Nick Valensi and Albert Hammond Jr., the Strokes guitar assault was invigorating, with Mr. Valensi's huge, pealing, almost stupid riffs on "Under Cover of Darkness" and Mr. Hammond's nimble '50s rock interjections on "Last Nite".
Former Colombian president César Gaviria Trujillo told the small crowd at the Grand Hyatt in New York City that the UN's aim of a "society free of drug abuse" is "unrealistic, totally naive, almost stupid".
Many afternoons I have stood fishless on the bow of a Keys flats boat, longing for one of those places with so many bonefish that catching them becomes almost stupid.
"We need to be almost stupid-minded," he said of closers in general.
Consider how superb DiCaprio is in the scene with the FBI agent on the yacht; so tense and arch and almost-stupid.
(Jeffrey Goldberg, writing for TheAtlantic.com, called this statement "almost unbearably stupid. The image isn't anti-Semitic, at least not to anyone who has ever gone to grade school and/or has scrawled on a magazine").
And even after allegedly reading the encyclopedia, Jacobs still doesn't know who Samuel Beckett is, an admission that is almost criminally stupid, even for someone who has written for Entertainment Weekly.
I also know that in the West — a world with which I can identify just as easily — nations and peoples that take an excessive pride in their wealth, and in their glory at having brought us the Renaissance, the Enlightenment, and modernism, have, from time to time, succumbed to a self-satisfaction that is almost as stupid.
