Obama had his problems. He continued the wars started by his predecessor. He increased warrant-less wiretapping. He created (and administered) kill lists. He didn't have a single liberal in his Cabinet. He didn't fight for the public option in the health bill. He made concessions to Republicans before they even asked for any.
Obama was a politician. He said a lot of things we like to hear. He did do some good things in office. But he was not a liberal. He did not have progressive policies. Obama was actually center-right.
However, with all his faults, he was a much better President than the one we got now.