The Americans wield huge influence via the money they put in for things like TV rights and sponsorship.
There is very real unhappiness across Europe about the limited TV rights national broadcasters have been able to obtain, and frustration from sports fans about the poor quality of the coverage and commentary from the Discovery channel owned Eurosports. (Clare Balding and the BBC team are in Salford whilst US has been able to flood Tokyo with commentators.) The point of the Olympics is to give minority sports their place in the spotlight, yet fans of these sports have not been able to watch. There is also suspicion that the US have influenced the timing of popular events to best fit with US time zones, leaving others to compete at weird hours or the midday sun. One reason why few Olympic records are being broken in swimming, where finals are taking place in evening rather than the morning (or vv. I am afraid I am not the sports mad person in our household.)
An American push on the acceptance of gender theory is another issue. I wonder whether there is much push back from nations such as China or Russia, who both have some history of doping and who may not mind the blurring of the rules.
The end result of the US money buying influence is a dilution of the Olympic ideal. Though also an increase in frustration elsewhere at the way the US push their cultural imperialism.