Again, 90% of the world doesn't live in the culinary cradle that is the Mediterranean Sea and Fertile Crescent while also having the funds to support a diverse and interesting diet. About 30% of the world is food insecure. Rice, wheat and maize alone are about 2/3 of human caloric intake. 15 crops account for 90% of all human energy intake.
Food as hobby or art or cultural distinction is a rich country game. If you're going to exclude special occasion (or "rich person") food then you're deluding yourself to think that food in the USA is worse than any but a handful of countries.
Not sure where you're reading that into my comment, the USA is right up there with most developed countries. Using that as a proxy for "culinary development" it's in the mix with most European countries (coincidentally slightly above Spain by 2/3 metrics).
So you either subjectively hate USA cuisine for some reason or are unfairly comparing the two (eg. Average meal in Madrid vs
NYCMidwest McDonalds)