The Administration bungled this from start to finish
I agree with this, but not for the same reasons you state. The problem was and continues to be that there hasn't been enough force applied to the insurgency/secterian/terrorist-backed forces. If places like Fallujah and other hotspots had been leveled before they gained legs we wouldn't have been at this point. By not acting and only reacting to their antics we have emboldened them and they can claim victory over us weak-willed Americans.