Not that Americans should see China exporting more goods as a sign that the US economy has fallen apart. China has over four times the population, meaning it's exporting less than a quarter as much stuff per capita. China could grow to export four times as much stuff and that still wouldn't be a sign that the US's manufacturing sector is declining, only that it's holding its position.
And realistically, the US's manufacturing sector is incredibly strong - not just compared to other countries in the present, but also in comparison to itself in the past. I've got no idea why Americans get so worried that the country can manufacture so much stuff so profitably and with so little labor input that most their citizens get to work in the booming service and leisure economy made possible by that unprecedented level of efficiency, and feast on the luxury it produces, instead of grinding away on assembly lines. It seems nobody's quite capable of seeing the forest for this one particular infuriatingly backward-looking tree.