I'm curious to know who this collective "we" is that you're talking about. There is a lot that the United States does that is cause for concern, but there's also plenty the US does to help. You give me the impression that either you're either ignorant about everything that happens around the world or you're very selective about where you get your news.
As for the US military, for a whole host of reasons the US is endlessly doing Europe's dirty work. They sure are averse to getting involved, even when something's happening in their own backyard or their own meddling was the source of those problems. And in the end, while Europe enjoys the luxury of keeping its hands clean they have no shame in getting on their high horse about American involvement around the world.
Of course, the US could always take the Chinese approach of superficially not getting involved in anything, but supporting oppressive regimes so that they can strip nations of their resources. Take a look at what they're doing in Africa.