Speaking of ther NFLPA...
One of the biggest problems, imo, is that far too many people just can't seem to understand how a negotiation is supposed to work. It's been "reported" that Rodgers is pissed off that the last three years of the current contract are "team voidable." Well, Rodgers got something... if not a lot of somethings... in return for the team gaining that luxury. He got what he wanted but now, when it came time for the team to get theirs, he's red-assed? Sorry, pal, it just doesn't work that way.
Just like all the hullabaloo about the NFLPA advising players to boycott voluntary OTAs. The players' union didn't just come up with that out of nowhere, or for spite. This was the NFLPA saying to the players "You gave up something for this right. Do not be afraid to exercise it." During contract negotiations, the league said "Give us ______ and we'll allow certain mandatory OTA workouts to become voluntary." The players went for it and then a bunch of teams, if not all of them, still tried to treat those workouts as mandatory. It doesn't work that way for the teams, either.
As far as the players go, I think a lot of these agents need to be looked at pretty hard.