the list goes on pretty far; the khmer rouge, Moise Tschombe, The greek junta, francesco franco and on and on..
Brazilian junta, Fulgencio Batista, Chiang Kai-shek, Syngman Rhee, ...
https://en.everybodywiki.com/List_of_authoritarian_regimes_s...
https://en.wikipedia.org/wiki/U.S._policy_towards_authoritar...
Highly recommend: Killing Hope by William Blum, it dissects the history of the many authoritarian regimes the U.S. supported since WWII, coups the U.S. engineered, the revolutions it strangled in their infancy, governments it systematically destabilized, and the popular movements it crushed (often under the veneer of “stability” or “containment”).
If you're going to argue that the US support Chiang Kai-shek why not add in Stalin as well?
I'm not sure the US has supported Stalin in the same way, but sure... does that make it less bad?