Bush finished with about a 27 percent approval rating.
As a result, we got Obama. Good riddance to Toyko Rove.
Bush's approval rating was undermined by the economic "crisis" at the end of his term, largely created by Democrat policy (mandated subprime mortgage lending by large banks, for one) and Democrat "solutions" (in particular, Wall Street bank bailouts by the federal government) pushed on him by his Democrat appointees, Hank Paulson and Ben Bernanke. You could say that those two worked from within Bush's administration to stab Bush in the back and grease the skids for Obama's winning the 2008 election, though McCain's pathetic campaign was a factor as well.