Personally, I'm a bit tired of this narrative; Bisping vs the Steroid Gang doesn't move me. It's a weak excuse for the least convincing champion.
Bisping has never been considered the best guy at MW, or even one of the best guys. Look at his resume this decade. Until the title shot (which fell out of the sky) every time he fought a potential contender, he lost. The UFC would then give him a MUCH easier fight to try and get him back in the mix.
He beats Rockhold, kudos, that was a fantastic win, and then fights the number thirteen ranked guy in his first defense, who almost killed him.
I wouldn't complain about Bisping but him ignoring contenders to fight Hendo was inexcusable. If it was such an important fight he should have had it before he had the title. If Hendo wouldn't take it before he had the title, then I guess it wasn't such an important fight.