First of all, I feel that he failed by not trying hard enough to reach out to the GOP and achieve bipartisan compromises, such as a "grand bargain" on deficit reduction; failing to approve the Keystone pipeline, and threatening to take unilateral action on immigration. Whether the Republicans would ever have agreed to work with him is not the point; the main thing is that he should have looked willing to work with them, rather than as a man who has given up on Washington.
WTF?! He bent over backwards to accommodate Republicans when he was trying to push the Affordable Care Act through Congress, and (perhaps frightened by the growing Tea Party movement) they still voted against it. And to add insult to injury, they then claimed that
he was the one who was being overly partisan about it.
It's a pity you are now accepting their narrative....