Obama's biggest failing, and what led to his disaster status, is trying to work with the current crop of Republicans in DC. So you should not have respect for any of them either, who also have much easier jobs.
Obama went overboard on the vote pandering. People's expectations were to high. Probably the worst timed election in history too, it was only in 2009 when the scale of the economic problems became clear.
The hatred of Obama is interesting. Seems even worse then the Dubya hate in U.S. (which was quite extreme, but far more deserving).
Bush created a massive deficit during a time of economic prosperity from a deficit. He oversaw huge governmental interference in people's private lives. He started a war based on wrong information simply to finish the job his father failed to finish. He enriched those already disproportionatly benfitting from the good times at the expense of the rest of society.
Obama inherited all these things, and a ruined economy (a legacy of Bush, and other past presidnets, beginning with and primarily Reagan), and tried to deal with them. He tried to fix the broken healthcare system which states were failing to fix (not that it shouldnt be their near exclusive reponsability, but hey). He tried to cut the deficit.
Yet he is despised by a disproportionate amount of people.