An awful lot of that flouncing is done in response to requests for assistance. Iraq and Afghanistan certainly weren't (more a case of cleaning out hornet nests that nobody else wanted to tackle) but much of the rest was. Do you think that people in Vietnam, Cambodia, Burma, N.Korea, et al. are better off than people in South Korea, Taiwan, and Japan? What about Western Europe? Why do you think that Costa Rica is able to continue to exist, unmolested, without a standing army?
America is the evil overlord that is invited in, asked to base troops in distant countries that, if your view of Americans as hillbillies who read maps upside-down were correct, American citizens don't give two shits about. America is the despot that allows its own subjects to curse, mock, and damn it without being disappeared, shot, or tortured ... and the subjects of its client states too.
The USA is far from perfect but the attitudes that you deride created a world that's still flawed and filled with death, loss, and tragedy but one which has a lot of ... freedom and democracy ... and which is much nicer than what might otherwise exist.
As for Americans not criticizing other countries being a matter of ignorance alone, I think that Americans know as much or more about the rest of the world as non-Americans at equivalent socioeconomic levels. Nevertheless, if you re-read my post, I was comparing apples to apples: American Geo posters vs. non-American Geo posters.
I am critical of HK and of the Mainland and sometimes of the USA (e.g. the gun problem, hollowing out of the economy, etc.) and perhaps occasionally critical of Russia and North Korea but you would be hard-pressed to find me ranting about another country -- especially a liberal democracy like, for example, the UK, France, Australia, New Zealand, or Canada. This also seems to be true of the other Geo posters who hail from the United States.