Your list is awesome, but how does the lack of those accomplishments translate into conservatives not backing the more conservative candidates that were in the race now?
First, I think the White House and Congress had a slim window to prove that conservatism works. They failed miserably in my estimation. You and I know Bush isn't a conservative, but the average voter believes Bush is a conservate, he's failed, therefore conservatism has failed. That makes it much more difficult to run as a conservative. Had the GOP enacted conservative legislation with positive results, the climate would be much more favorable.
Second, most in the GOP intuitively know that this party is in deep trouble this year. Much of that trouble is directly attributable to the GOP itself. Many think the only way to avoid that is to run left; consequently many conservatives have betrayed their principles because they think it will prevent a Hillary Presidency.
Finally, conservatives of all types (fiscal, national security, social) have been repeatedly kicked in the teeth over the last eight years. History has demonstrated that "going along to get along" nets them nothing. Understandably, their mentality has changed to "all or nothing" and the chances of a coalition conservative candidate (i.e. Fred Thompson) has been reduced.