Maybe, but doomed is not the best word. All around the world people are saying the US is doomed. They're also saying Europe is doomed. Is that true? China today has a shaky economy but they are so far ahead of where they were just a few decades ago when people said China is doomed. Now it has a very robust infrastructure and is better prepared for the future and has a role in shaping the future. OTOH, America really hasn't invested much in its infrastructure and instead invested so much money abroad that really had a bad ROI, and much of it was in China. Now its financial system is one Lehman Moment away from collapse, and China can cause that collapse if it wants. Trump knows he has to be very careful with China.
What I have been hearing is the opposite of that. We have a well developed and relatively balanced society and economy.
CHINA does not.
YOu might want to check out this guy.