In my experience, Chinese people tend to be more critical in general (and correspondingly less affected by criticism.) Maybe that's a massive overgeneralization, but if you transplant this taxi driver to the United States, he would have the same complaints about Americans.
I'm not sure if it's being more critical or just being more honest (or less tactful) when talking to or about people.
I think people everywhere in the world are also critical of others but don't show it because it's not politically correct or tactful or whatever reason...
A bit OT, but I find it rather interesting how much the definition of being tactful when talking about people changes according to countries... In Japan for example, it's considered a bit tactless to point out your mistake in Japanese whereas in France or in China, they are much more likely to correct you whenever you make a mistake without considering that as being impolite.
