They are alarmed by what happened recently, and they will surely ensure that next time in international competition, they can bounce back. It's a wake-up call for them, I guess, and it makes them realize that other countries are becoming more competitive now, especially the European teams. They can't be too complacent because this tournament is not the same as it was years ago.
That's why the upcoming Olympics will be more interesting, as we will see how the USA tries to prove to the world that they are still the best in basketball competition. They can bring in veterans with high IQ in the game, maybe LeBron James, Kevin Durant, Stephen Curry, Embiid, and Leonard. These guys are very athletic but, of course, they should be mixed with younger superstars as well so they can truly dominate. Changing the coach would also be a good idea, as the players I mentioned might not play at a fast pace, which is the reason why Team USA was composed of young players.
These are just my speculations and opinions, though. I am just quite upset with what happened, and I want to see a very dominant Team USA roster so that competing countries will be tested and may learn to improve more their brand of basketball.