Why would someone DV this? It is pretty much spot on. Whether Joey was right or wrong in his hardline stance (sounds like he was), it really looks like his 2 choices now are 1) Sign a less friendly deal this year or 2) sit out and re-enter the 2017 draft.
Sitting out til next year seems increasingly likely, and the opportunity cost of signing that Chargers offer and playing this year far outweighs getting pennies on the dollar he's fighting for here. It is very unlikely he will be a top 3-5 pick next year after sitting out a whole season. Which then guarantees his new 2017 contract will be for less money, and he will have no bargaining power for these small details he's fighting here anyway. Also, his future big payday will be 1 year further away.
Unfortunately the Chargers know that and are also being ridiculously stubborn. Seems like both sides have backed themselves into an unwinnable situation.
I just don't get the sentiment Joey is doing "what is best for him". I mean maybe it feels that way now that there is obviously irreconcilable differences between him and the Chargers, so playing for a different organization will be better. But he has certainly lost himself money over this, maybe a lot depending on what happens next year.