Obama's hardly gone wrong anywhere. The impending retaking of Congressional control by the awful party can be summed up in three words.
Democrats. Are. Pussies.
That's it. They don't defend anything they do. They don't brag about anything they do. They run from their accomplishments at the hint of a GOP ad campaign. They stand up to nothing and nobody from the right.
This same rinse-and-repeat cycle of Republicans coming into power and putting the country on the path to ruin, a reactionary swing to the Democrats, and a subsequent forgive-and-forget en masse for the GOP will continue forever until liberals stand up for their accomplishments and their ideals.
I'm afraid it is not all that more complicated than that.
Obama doesn't count in the "Democrats are pussies" critique? Like I said earlier, he could've marginalized the GOP back in 2009, and instead chose to give them a hand and help them regain power.
Part of the President's job is to be somewhat agreeable with both sides. Could he have been tougher on the right? Sure, but you want some of your attack dogs and idealists to come out of the legislature, where they are all scattering left and right away from everything their supposed party leader has done.