This is WAY overblown
The US has very favorable demographics by the standards of modern western economic powers, we have a MASSIVE generation of young workers (millenials, nearly all of whom are still under age 40), we have the most favorable geography of any global power in human history, we can create a supply chain tied ENTIRELY to the North American continent if we really wanted/needed to and we have generations of moderately skilled, cheap production directly to our south from the nation most favorably set up to benefit off the impending collapse of the CCP.
We're gonna have some rough years over the next decade or two for sure, but America will be MUCH stronger relative to the rest of the world than we are today by 2040.