Because the bad ones weren't decided by his picks. He has moved the court substantially to the left with his nominations and did so with comparatively young judges who will likely substantially outlive all of their conservative peers.
Yeah, because I was saying Obama did it all himself, lone gunman style. He's the fucking POTUS. The Fed reports directly to him. The fact that he has accomplished as much as he as despite only two years of three branch control and a stated GOP-wide goal of first making him a one term POTUS and when that failed obstructing EVERYTHING he proposed only makes his accomplishments that much more impressive.
He isn't throwing up these wins with unified support like most transformational Presidents get to experience for a substantial portion of their tenure. Hell, he hasn't even been doing it with an adversarial yet honest opposition in control of the House or Senate. He's been doing it with both houses seeded with politicians who think screaming "YOU LIE!" in the middle of the State of the Union is appropriate, that defunding and closing the federal gov't isn't just a good political tactic but a good thing politically, and as the first POTUS serving after Citizen's United leading to literally non-stop partisan hit jobs on all of his legislative efforts (not to mention him and his family personally like basically no other POTUS ever).
He's a fucking marvel.
Good negotiating stemming from brilliant geo-political gamesmanship, that directly resulted int hose countries setting themselves up for his trap card.
It is an accomplishment to have the acumen and insight into the legal world to be able to consistently pull strong yet progressive candidates out for not just the SCOTUS but also the lower courts. Many Presidents go low interest on the lower courts, Obama has approached them with almost as much fervor and political stage setting as he does SCOTUS appointments. That is how you literally change the future.
