This is the second time you've categorised it as choosing "the lesser evil". I don't think that's what the system was designed to be. It sounds to me like it's so far off the rails that the real lesser evil choice is to refuse to participate in the process and rob it of its credibility.

If I vote for the losing party, I implicitly agree to abide by the choices made by the winning party because I would expect the same from their supporters if the roles were reversed. None of the parties represent my interests, so I don't vote and I certainly don't agree to respect the decisions made by those who don't represent my interests.

To tie it back in with the original point, those who voted against Bush implicitly agreed to abide by his decisions if he won. Only those who refuse to participate in the system can claim zero complicity.