Dirk outplayed LeBron, Kobe, Wade, and Durant all in one playoffs, why beef about someone saying he's the best?

He's the best in the game. I was told all those players are 20x better than Dirk. Clearly they aren't and he's destroyed them all in the 4th quarter. And he's won a title with no allstar next to him while LBJ joined 2. So how exactly is LeBron the "undisputed" best player?