It's possible that the… uh, 4? I think? Times I've spent a month in the USA, covering California, Nevada, Utah, NYC, New Jersey, Rhode Island, Massachusetts (and Connecticut, only on the way through, but had a pizza there) may have not been diverse enough to fully encompass your cuisine, but…
But the food I actually saw in the USA was mediocre.
I didn't have any interest in 20 varieties of Oreo or bars of chocolate with bits of pork in it (for the latter, I'm vegetarian); the stuff that Whole Foods sold had slightly less flavour and variety than European discount stores like Aldi, Trader Joe's might as well have been a corner shop; the fancy restaurants were merely OK, the only positive of the fast food joints was the low cost, the "oh, you gotta try this while you're in Manhattan!" cafes and diners were on par with the random UK town centre breakfast diners you try once to see what they're like and never go back to, all the pubs were somehow even worse than Wetherspoons (UK chain with a bad reputation), the "cheese sauce" on tortilla chips was on par among the absolute worst approximations of cheese I have ever encountered.
And why is half your yoghurt thickened with gelatine, anyway?
The best food I had in the country was at a place covered by an NDA; but even that, the best, was "4 stars out of 5" by European standards.