The US hegemony has been a tremendous boon to the world. Yes, the US has done terrible things (lots in South America, Vietnam, genocide in East Timor, failed nation building and war crimes in the Middle East, support for genocide in Palestine, etc.) This isn’t to minimize that.
But the reality is that the US benefits immensely from free democracies with rules-based open markets and international order. Again, do we break that when it suits us? Absolutely. But America being selfish has been a positive outcome compared to, for example, more war in Europe.
Polls consistently show that people recognize the benefits of US hegemony while acknowledging that the US does it purely from self-interest.
The absence of war in Europe is more down to the EU than the US. Polls do not consistently show anything of the sort.
> But the reality is that the US benefits immensely from free democracies
Would you like for me to start counting the number of times the US helped install a democracy vs the number of times it installed dictatorships?