The US has a lot of loses. Four of four conflicts that China was a part of resulted in defeat with the Korean war at least not being a total failure. The US has not been in a conflict that wasn't massacuring what are essentially militias in a long long time. Defeating a beleaguered Iraq is played up as some great accomplishment which is really pathetic. The US has demonstrated that they do not hold a meaningful technical edge over Russia by their equipment's performance in Ukraine. The loss is spun as "oh that was just junk we sent" which either means a) we're gullible to believe that or b) our leaders suck. Either way you spin it, we lose.

The US isn't the military power house that it used to be and the current generation of leaders is riding on the coattails of a reputation that's long become untrue.