Hell, I'm from the UK, and I'm not particularly bothered about the Olympics; I was simply proud that we won far more than we usually do, and that most of us have a mentality of "china and the USA win everything because they're huge superpowers, have a far bigger selection of sports-people, are huge countries. We're fine, not bitter, and proud to be good at ANYTHING." Plus I think the fact we won Tennis finally just sealed it.
I have not met or spoken to one person who is "pissed" about America getting more medals.
Good on you.
OT: I have no idea why EU always wins, there seem to be fantastic players from every single region.
I can't think of any social concepts or even genetic ones that might make Americans "worse gamers", because they're not.