Which side of the road you drive on doesn’t really make any difference to anyone’s lives. Not properly paying a large section of the population does effect lives. That, and harassing customers for money is no way to run a business I don’t find it an acceptable behaviour.
I agree with you that people should know the customs of the country they are going to, but I think most Europeans especially the continental ones expect America to have the same kind of employee protections that we have as you claim to be the best country ever at everything.
And yes, America is the only current superpower, but it isn’t nearly as important or as powerful as most Americans like to make out. One example of this is the terrible foreign relations, everybody hates you. Britains position in both the Commonwealth, and currently the EU gives it soft powers that America doesn’t have at the moment. It is much easier to travel to most countries with a British passport than an American one, why do you think this is?