While Obama is far from "great" and perhaps not even "good", he's a far cry better than Bush was. He has made some terrible mistakes but also accomplished some good things. Of course the whackjobs on the extremes of either side will say Obama or Bush never did anything well. But while Obama has passed policy that I'm not fond of (e.g. ObamaCare), he is a far, far cry better than Bush ever was. Bush was an embarrassment of the US to the whole world. He was a baffoon. He got caught committing felonies on a mass scale and instead of any remorse or responsibility, invented the "Victim of the Liberal Media" complex for the GOP. Bush started with every possible advantage and tanked it all. Obama started with every possible DISadvantage and while he is not the Messiah that Conservatives like to label him, at least didn't let things crumble into oblivion. Oh and of course, everyone but the whackjobs are grateful for the dozens of Ops in Afghanistan that led to Pakistan, that led to Islamibad, that led to the first ever public ransom of an undercover spy, that led to Abbotibad, that led to the guy Bush said "wasn't important". That's a bit more than the "just gave a nod" BS that the kool-aid drinkers like to claim was all he did.
So he's not great. He's made some mistakes. But compared to Bush?
No comparison.