Not a trope when its true and factual. Hell, ex-CIA directors have even admitted it in books and TV! Most Americans don't like hearing that their government can be one of the "bad guys".
This would be true if there wasn't a huge list of coup attempts in developing countries backed by the U.S. dating back almost a hundred years up until today. It's not a conspiracy, the U.S. has engaged and continues to engage in political interventions world over when they deem it necessary.