Anything in the record since the red headed trainee took over say otherwise? I'll wait for your witty gif....
You simply said: RKG = 8-8.
So, you are jumping to the conclusion that RKG's led to the mediocrity, when there is alot behind those 8-8 seasons that has nothing to do with the RKG philosophy.
First, the cap situation that was created by Jerry Jones/Wade Phillips.
Second, Jerry Jones over-paying veterans for what they had done as opposed to what they were going to do.
Third, injuries. Yes, we drafted players with injury histories, because in the cap era, with the cap situation we have had, the Cowboys hand has been forced to take chances. It is either that or get the wrong kind of guy who doesn't fit the scheme or simply can't play.
Fourth, poor in-game management by Jason Garrett.
Fifth, poor choices by Tony Romo and other players.
Sixth, luck. Yes, luck sometimes has alot to do with it.
Seventh, leftover players from the Wade-era with a sense of entitlement and were not Jason's RKG's.
Eighth, poor draft classes over the last several years.
Perhaps I should have responded this way rather than the face palm, but I honestly felt like if you have been paying attention the last several years, these are things you should have already known. Or were you just trying to be funny?