I agree that Bush was put in a bad spot after 911, but his business policies, more than anything caused all of the problems that we have now. Obama was also put in a bad spot which was inheriting all of the Bush mistakes. Could he have done better? Sure he could have. But what many of us say is to give him a fighting chance and with the Republican more concerned with getting rid of Obama than working with him, he's at a disadvantage.
Nobody thinks Obama is the Messiah, but until the Republicans, Democrats, or a third party comes along with someone better, then I'm sticking with Obama.