In my point of view, America is disliked, at least in Mexico, for the lack of culture of it's own. If there's a culture that is to be associated with America is that of consumerism, pop culture, and trashy morals. I know how you all like to think of yourselves as the ultimate purveyors of liberty and whatnot, but outside your borders you're not seen that way. It is that smug attitude that you're representing the free and the great and that you're somehow the epitome of all the human civilizations that turns other people against it.
Refer to Legacy's post for an example.
To me, I mostly dislike the american way of life because everything seems so... syntethic. It's hard to explain. It's like in Mexico, if you want to meet a woman in a club, you have to approach her, talk to her, buy her a couple drinks, and dance like god intended. From what I've seen, at least in the Americans I've seen in Mexican clubs (cannot legally enter US clubs), the appropiate way to meet an American woman in a club is to approach her from behind while she is dancing and rub your package all over her ass, then proceed to get her wasted. I mean, I realize that's probably not how you meet a decent woman, but the fact that that is the way how men approach any woman at a club is frankly repulsing.
At the same time, it's synthetic in the way that yo go to any McDonalds and get the same food, with the same design, etc. And this happens in non-chain restaurants as well. There's something beautiful about that sweaty mexican making tacos with his bare sweaty hands in a greasy stand in the middle of the street, or that chinese lady that cooks and sells dumplings from her garage filled with stray dogs and 12 kids, or the indian yelling down the street to come buy handcrafted pottery or whatnot. America lacks all those features of it's own.