Not really wrong. This is the kind of thing that guys like you love to bellyache about, but at the end of the day, the fact that Dez didn't show for and MRI, got fined for it, and ended up missing a meeting amounts to him missing a meeting in the lead up to SF. A distraction, ok, but a minor one.
In two weeks, nobody will remember it. And if anybody asked the players about it now, they're not going to care. Dez comes with some personality issues, period. The team knew that when they signed him and they signed him anyway. Episodes like this are going to happen his entire career and, when they're said and done, they're not going to amount to anything but a bunch of hot hair on a Wednesday afternoon.