I've watched mainly three esports over the years. Warcraft 3, starcraft 2 and counter-strike. Best player ever in wc3 is Happy(Russian), sc2 is Serral(Finnish), cs2 is Astralis(all danish team). USA does seem to have solid players in many things but in the things ive watched its always Europeans that can match or sometimes exceed Koreans where USA doesnt seem to be able. Americans seem to be good at speedrunning games though which takes high intelligence.