I'll preface this by saying that I haven't watched the show in years.

Watching from outside the US it does feel pretty solidly pro US. The core message seems to be that sure, we have some dumb politicians and occasionally our huge companies do some dumb and evil shit, but that is the aberration. The Real America is made up of fundamentally Good People striving to do the Right Thing and that will always prevail over any temporary glitches in the system. All the criticisms they levy are the same criticisms being made at the time by all Good Americans.

The show is obviously made by two people who love their country despite/because of all its flaws and that clearly shines through.