The reverse is true: people who say things like "The US century is over" almost always dislike the US or wish its global influence would decline. Their commentary is wishful thinking.
There is some probability that US global influence does significantly decline but I wouldn't hold my breath.
I believe the recent line from a US ally at a recent security summit was, "We will never fucking trust you again."
https://www.readtheline.ca/p/matt-gurney-we-will-never-fucki...
Not true. Some, like myself, love the idea of the shining city on the hill, although we often find the behavior of the actual city less than shining.
I would like for the US to continue being a beacon of freedom where people can come and build great lives.
But that is not the direction we are going, and one might reasonably forecast that no country can maintain indefinite dominance. Paul Kennedy wrote "The Rise and Fall of the Great Powers" almost 40 years ago. Regression to the mean and all that, but also, great powers tend to overstep.