AGAIN, you simply don't understand the game of football or the QB position. Wentz is another great example that proves this ridiculous theory dead wrong. Wentz has not "regressed", he had a major injury. Takes time. Throw into the equation that their running game has been non existent since the injury to their #1 back, and the decreased play of the defense and you have your problems for the "slump" as you would incorrectly call it.
Just like there are a whole host of reasons why Dak isn't playing like he did in 2016. All obvious stuff.
The "hope" that you mention came in the form of Amari Cooper, and will continue to follow if we can get this Oline fixed in the offseason.