I think the US bombing various places is a bit more nuanced than it seems at first sight. For example, our military action in Libya - which is entirely contained to one coastal town - is with the support of the Libyan government, the vast majority of the Libyan people, and the United Nations. It's an air campaign against an ISIS stronghold, and it's pretty black and white in that most people agree that it should be done.
I personally don't support our airstrikes in Pakistan, but they have definitely been effective (although at a devastating price to civilian lives that I find unacceptable.)
In some cases, the US government is an unimaginable force for evil; we've dropped chemical weapons on a civilian population as recently as 2004, in the 2nd Battle of Fallujah - one of the worse battles of modern times. In others, it's an unimaginable case for good.
For example, during the Indian Ocean tsunami, governments around the world donated billions of dollars. America promised unimaginable quantities of food, fresh water, and support. Within days, American aid began arriving - in the form of two aircraft carriers, basically floating cities. During the crisis period, American forces delivered the daily food requirements for 100,000 people every 24 hours.
In the end of March 2005 - remember, the tsunami was in December 2004 - the Indonesian and Sri Lankan governments reported that they had received precisely none of the money promised by foreign governments. They did report receiving some food; the Thai government in particular received many donations of rice from the governments of Israel and China. To demonstrate how pants-on-head stupid that was, Thailand is the world's largest exporter of rice, and that year they had their largest crop of rice in all history.
So yes, America can be horrible. But America can also be the world's largest source of good, especially when other governments can't step up to the plate.