First off, your beginning argument is wrong. "High School" in European countries, for example, and high school in America is not the same. Many will agree that high school education is much harder in other places, especially in France for example, where students have to pass the BAC. There is no such equivalent here in the US.
So, even if you forget what I just said, what you're trying to say is that US students whine too much, not that they are pampered. If they are pampered, it's suggested that somebody is pampering them. That is not the case.