They gave him a chance and he failed. Instead of blaming the organization, why not blame the player?
"They gave him a chance and he failed."
Seriously??? 15 HRs and 47 RBI in almost exactly one half season of ABs against MLB pitching the first time he has ever been exposed to it while getting sporadic playing time is a "failure"???
God forbid he got regular playing time with a chance to make adjustments over the course of a few ABs in a row, much less 2-3 games played per week rather than 1-2 pinch hit ABs per week in pressure situations. If that had happened he'd have been an utter embarassment by your standards (22-25 HRs and 65 RBI out of a part-time player is definitely not what any contender would like to have available at the drop of a hat).
Numbers guys can make these things fit whenever the argument they're making calls for it, but I'd venture a guess that even the most numerically-inclined folks around these parts wouldn't come close to calling Gattis a "failure" - certainly not at this point. Rather I'd bet that they'd mention sample size and lack of REGULAR playing time as the cause of Evan's struggles.
Did he "fail" to win the ROY following a sizzling start, sure. Did that have as much to do with a lack of opportunity to see and make adjustments to the adjustments the Pitchers he faced had made? Absolutely.