Pretty much all the US fighter jets were Soviet copies. The teen fighter series were copied from the Soviets after the Soviet fighters made a complete mockery of US technology. Heck most of the US space program and missile program was stolen from German technology.
Most US products use innovation from other countries and the US merely assembles it together. The US is nothing special.
China is the largest economy, largest manufacturer, largest consumer, largest innovator.
US just dominated a weak era with no decent rivals and as soon as China emerged, we proved the US is nothing special.
Even as a developing country we are embarrassing the so called 'superpower'.
Boeing can't even make passenger jets by itself. It buys the technologies other countries innovated and assemble it