From my personal experience in living in many countries and continents as a child and revisiting them as an adult, I'd say, yes, America and Americans are hated or at least very poorly thought of.

Americans as a whole are seen as arrogant and frequently naive. Many American tourists go to a foreign country and expect the people there to speak English. They don't bother learning the exchange rate (which was wonderful for some since it made it easier to short-change the Yanks plus, at one time, the American dollar was coveted because of its value). To overcome the shortcomings of not speaking the native language, many frequently raised their voices as if shouting made them more understandable.

Politically, most Americans are seen as naive and their government as a bully. Americans seem to expect gratitude for bailing out countries either through entering the wars or with the financial aid that is so freely given. Sadly, that is not how most Europeans feel. While the Yanks did go to Europe and die there, WWII was fought on their home ground. To them, America entered the war not to help them but rather to keep the war off their soil. They did not ask for the troops but rather the weapons and the funding.

On the Asian front, it was felt that America entered for two reasons -- Pearl Harbor forced them to and it was a way to keep land already "owned" by them and to gain new territories. VietNam and Korea were both civil wars. We entered VietNam because of a promise made to the French that we would help out if they had to leave. Doesn't make for loving feelings to a country when one oppressor is finally driven out and another comes in claiming to "help." At least in Korea, the South Korean government truly asked us to come in and help.

The Middle East is entirely another story. We've backed Israel, which has not made us popular to the Arab world. We insist that Judaism and Christianity are the only religions to be considered. We've stuck our noses into the politics of almost every, if not every, Middle Eastern nation by backing those who we felt would best aid the USA, not what was best for that nation. The Shah of Iran is the prime example of that policy.

Africa is not even worth mentioning considering how many despots we have put into power there over the decades. We have frequently sent aid in the form of medicines that we would not use at home and second-rate equipment and expected some pretty big thanks for that. When we lived in Africa, it was where I was the most ashamed to be American. People would go there for visits, usually safaris. They would treat their guides and the local vendors like dirt. Imagine if, being a child and understanding this was wrong, how would it have been to be an adult and be treated so badly? I have not been back to Africa as an adult, so I don't really have personal experience of how they feel today. However, I do have a very close friend who works for Chevron and has worked and lived in several north and western African nations. I found it telling that on days off the workers did not go to local towns or villages, did not visit major tourist areas but rather spent their spare time in corporate-made vacation areas, usually islands away from the natives.

I truly can't say anything about South and Central America. We weren't there long enough to be more than over-extended touristas and have not been back as an adult.

I seriously doubt if you will get honest feelings at a business dinner or speaking to those who have to do business with you. It isn't productive to insult those buying from or selling to you, whether at a local store or at a large corporation. It takes living there, being able to speak the language at least well enough to understand what is being said as you leave, having friends who will honestly translate for you to get the flavor of these people.

I do agree that the majority all over the world like Americans and consider them to be friendly and outgoing (at least in European countries, Asian countries have a much different viewpoint and one that is truly difficult to understand if not Asian yourself), sometimes to a fault, but likable nonetheless. However, it is not a handful but a large enough minority to make it apparent that the Yanks can go home, just leave the money, please. I agree it is not a banquet, but it is not just a sandwich, maybe a well-stocked lunch.