I don’t get the hate for American cheese. I’ve had mediocre cheeses from all over the world and I’ve had really good American cheese.
Maybe everyone grew up on or is thinking of government cheese.
My personal preference is two layers of sharp cheddar and a layer of fontina or emmental in the middle. Butter inside and out with a low-ish temperature pan fry.
OK. Fact is, American cheese is cheese. It’s processed, but the stuff I use is cheese, not “cheese product”. It’s not very good for much, and I was mostly being facetious, but I do use it in grilled cheese, and on burgers. It is engineered to be melty and mild, and to infuriate food snobs. Job done.