In the Brexit-headed UK there is considerable discussion about this, some Brits don't consider US food to be edible. Phrases like 'chlorinated chicken' get mentioned.
Are those soy beans fed to people or pigs? Same with all that corn. None of it can be eaten, it has to be processed into corn syrup or fake potato crisps. There is no modern marvel of engineering, it is monoculture, as if nothing was learned from the dustbowl. It is also heavily subsidised. Watered by fracked aquifiers. To international tastes it is all bland, adulterated and not really food.
Those exports also put people out of work on the global market so they are not growing their own food, just importing nonsense like American maize.
I am not into Chinese food but I know that Chinese people don't consider U.S. food as having much taste, not even real food.
On the other hand, there are far less flat lands but mountains and deserts here in China. But the engineering and infrastructure is getting better and better.