Where do you guys shop in the US? If you explore stores beyond 7/11, you'll see that there is plenty of "normal food" in the US.
Some people choose to eat artificially-produced cheese substitute, but despite the ads you see on TV, not everyone does.
The same goes for coffee and beer, mentioned in comments below. I always buy coffee within a day or two of roasting, and even if I buy it at the grocery store, it's still within two weeks. Sure, you can buy old coffee and save money, but you don't have to. (As for pre-ground coffee, many people value the convenience of not having to buy a $200 coffee grinder and grind their own coffee over having the best coffee possible. In America, you get to decide!)
Finally, we have a lot of good beer over here. In Chicago we have Two Brothers and Goose Island (who sometimes produce a good beer; Green Line Pale Ale -- tasty), and New Belgium and Dogfish Head are good American beers that are widely distributed throughout the country.
I think you Europeans need to watch a little less TV before you judge.