I started having my doubts about the US a long time ago. But they were quiet, nagging voices. The thing that triggered it was after Saddam fell; the first thing the US did to improve infracstructure for the citizens was not restoring the electrical and water supplies, it was opening up a round of bidding about who would build the mobile phone network...
You are right, the world would be different today if the British Empire still existed. I am not getting dewy-eyed or nostalgic, but if the Suez crisis had not occurred, I genuinely think the world would be a safer place today. To me that even changed everything. Britain was exhausted after WW2, and totally ripped off by the US over lend-lease; so much territory lost, and money was still being repaid until December 2006, but I still think if the US had not deliberately set out to smash our world influence over Suez, we would have had a much more calming, balancing influence during the Cold War and post-Perstroika eras.