As a commonwealther who has tried American beer when she turned 21, I can tell you the complaints are just Europeans making a big deal as Europeans do. Err, I should clarify; American beer is an acquired taste, yes, but all beer is an acquired taste. I didn't like European beer any more.
Rule of thumb, if a European is complaining about American customs, it's most likely their pessimism for the sake of it. They hate American beer. They hate velveeta and decry it as fake cheese even though fake cheese wouldn't cause an allergic reaction. They hate that Americans put dressing on salad, saying "why don't you want to taste the salad". They hate Americanized spaghetti even though it was Italians that Americanized spaghetti. They hate New York pizza. They hate the American fast food industry. All while they seldom question why they consider haggis, snails, casu marzu "delicacies". The only stereotypical thing I've never seen them hate on, ironically, is Buffalo wings.