If you looked at the history of vetos in the UNSC, you'll find that initially it was the USSR that most often vetoed resolutions, but at some point (presumably after 1967) the US began to veto resolutions having to do with Israel and nowadays is just about the only country that regularly vetoes reoulutions, as well as dominating the overall tally of vetoes.
The fact that the US uses veto so often indicates that it doesn't dominate the UNSC. If it did, it wouldn't need to veto anything. Bush is a symptom, not the disease.
As long as (at least) China, the US and Russia have the potential for Mutually Assured Destruction, they need to have veto power at the UNSC.
What is deeply disturbing is that the US doesn't seem to give a rat's ass about the UNSC, or the global balance of power, and they even seem to think they can achieve a nuclear first strike capability soon. Bush is a symptom, not the disease.