Well, there are a lot of "American" cheeses, meaning cheeses that are made in America. And some of them are pretty good: cheddar and colby from Wisconsin, cream cheese from Philadelphia, Monterey jack cheese from Monterey, California (obviously) just to name a few.
Unfortunately, what most of the world knows as "American cheese" is a specific, heavily-processed
cheese-flavored product made by Kraft Foods Inc., who patented the process of making it in like 1920. It's not cheese; it's what Capitalism
does to cheese. It's a pale, sad mockery of actual cheeses from America and it's embarrassing us in front of the whole world.
So before you write off the whole catalog of American cheeses because of that single emulsified example, go treat yourself to some
Humboldt Fog, or some
BellaVitano. America can do so much better than Kraft Singles.