You said "Cooper carried him". Are you talking about Amari Cooper or not, because if you aren't then what you said makes no sense.
Yes, he did lead the team to a 5-1 record. That is what QBs do. They are considered the default leaders of the team while they are on the field.
The original point was, if Cooper is just a practice squad QB, then was the team so good that it could compensate for his lack of ability and/or ineptness? And if it was the latter, why can't Dak take such a great team to the promise land? Or maybe the difference between Cooper and Dak isn't so significant to justify such a huge salary discrepancy. It's the difference between maybe 3-4 games won in the season. You can't have it both ways.
I'm not defending Cooper Rush per se. I don't think he's more than a backup QB. But this idea that Cooper is carried by the team while Dak is not is just biased and arbitrary. Being better doesn't necessarily remove that attribution.
Also, the notion that you're a Dak stan doesn't just disappear because someone defends Rush.
That was lot of typing, showing zero actual understanding of what occurred.
Rush passed for less than 200 yards per game and less than 1 TD per game.
The Dallas defense was fully healthy and playing extremely well. --Before Lewis, LVE and AB were injured.
Dallas scored 25 points 1 time with Rush at QB.
They scored 25 or more all but 1 game that Dak completed.
Rush's last game was against Philly. He completed less than 50% of his passes and tossed 3 picks in a 17-26 loss.
Dak faced the same team later in the season and we scored 40 points.
This isn't a Dallas fan argument.
It's a goofy argument versus all GMs everywhere as Rush became a free agent and signed a 2-year 5M contract.
But that isn't to just crap on the guy. He is a replacement level back up much like Jason Garrett was.
Lance has a much higher ceiling, but Rush has a well-known floor that you can survive with versus midline or worse teams if the other 2 phases win.
There is a reason teams might try to trade for Lance but are not trying to trade for Rush.