Look at the facts on the ground. The United States government is well-documented for atrocities ranging from torture to extrajudicial killing to political assassinations to mass surveillance, not to mention providing support to private American corporations involved in similarly disgusting behavior.
Has this impacted the power of the United States? Not really. France, Portugal, Spain, and Italy -- countries with tremendous "pride of place" and a sometimes sneering disdain for the US -- denied airspace to a foreign head of state on the mere suspicion that Edward Snowden was on board. The US is still, by at least an order of magnitude, the most powerful country in the world.
The only challenge to US hegemony is the declining relevance of the US economy relative to other world economies like China, India, Russia, Brazil, and others. In the end, only money and guns talk. There is no "kill shot" leak as long as Bank of America has the right friends in Washington.