People who complain about how lucky he is with judges simply do not know how to score a fight. The only decision that can be considered questionable was the second Frankie Edgar fight, and that was after steamrolling Edgar 4 rounds to 1 in their previous fight.
He clearly beat Diaz, Melendez, and Thomson. He just did so narrowly against Melendez and Thomson. Still obvious wins though, I mean seriously what the fuck did either of those guys do to beat him? Because they certainly didn't outstrike, outpace, outwork, or control him.