Things that are so obvious and ingrained that no one even thinks about them.
Here’s a few:
All US americans can go to Mexico EASILY. You’re supposed to have a passport but you don’t even need one (for car/foot crossing). Versus, it’s really hard for Mexicans, who aren’t wealthy, to secure a VISA to enter the US. I’m sure there are corollaries in other geo-regions.
Another one is wealthy countries having access to vaccines far ahead of “poor” countries.
In US, we might pay lip service to equal child-hood education but most of the funding pulls from local taxes so some kids might receive ~$10000 in spending while another receives $2000. I’m not looking it up at the moment, but I’m SURE there are strong racial stratas.
While there is certainly some truth to what you are saying, I feel that your interpretation of events and motivations is way too cynical. But regardless, it's pretty tough to argue that the US has not provided a net gain to humanity, given the advancements in technology, medicine, arts, and so on that could not have occurred in a different society.
I certainly don't have any good reason to feel optimistic about the past, present, or future of this imperialist, settler-colonial, capitalist nation which would rather start WW3 than give up a shred of its post WW2 hegemony.
What supernatural qualities does the United States have such that, were it removed from history, a bunch of "technology, medicine, arts and so on" would have never been invented? Take the nuclear bomb for example. An American invention. Had America never existed, it still would have been invented, eventually, just somewhere else. Splitting the atom would have occurred to some physicist eventually. Using it as a weapon would have occurred eventually. I'm a staunch materialist about these things. America is just a geopolitical construct. Everything invented in America, by Americans, could have been invented somewhere else, by someone else, under similar circumstances. Technology comes about because a need/desire for it arises, and the materials to create it are available. Not because of the supernatural qualities of the nation.