He said "yes we CAN". Nobody has ever said anything about DOING anything!
I was very surprised that he actually could so much.
After so many decades, he managed to set up some health care system in the last industrial country which didn't have one. It's a very right-wing system, actually inspired by Romney's system (probably in the naive hope to gain wide republican support), but it's much better than no universal health care at all.
He managed to make progress and a significant deal with Iran.
He normalized relations with Cuba.
Most of all, unlike Europe, he managed to start a recovery from the terrible economic depression that he had inherited.
I don't quite understand why everyone seems to bash on Obama so much. It's amazing what he was able to achieve in such a hostile environment.