*** This is NOT about politics so do not turn it into that! If you do, your access will be removed!
I think the biggest problem is that just throwing together individuals with their own corporate sponsorships, agendas, goals, personal interests, etc. does not make for a great team.
In the past, US athletes were so far ahead of much of the rest of the world in talent that it allowed them to compensate for that disadvantage, but that has changed in recent years as the world has not only caught up but in some cases passed the US in various sports that the US was always expected to win or even dominate.
US Men's basketball experienced this long ago right after the "Dream Team" retired and that made them realize they needed to return to putting together teams, not all-stars and suddenly they started winning gold medals again.
The world has caught up to the US and if the US wants to keep winning team sports, it better start selecting players who care more about the team winning than their own corporate sponsorships, agendas, goals, personal interests, etc.
Unfortunately, that realization will be delayed by the inevitable blaming of the pandemic, the coaches, the schemes, etc. because of course it cannot possibly be the athletes' fault who are the best in the world in their minds.