Good QBs generally don't get credit for beating bad teams. NE was a bad team.
Good QBs don't generally get credit for winning single games when they are a fringe playoff team. AZ is on the outside looking in.
Good QBs don't generally get credit for digging themselves out of a hole they put themselves in. Kyler lost 3 games in a row against playoff quality teams when AZ was in control of it's own destiny.
If you want to argue Kyler is in the same class as Geno Smith and Sam Darnold and Russ, you have to hold him to the same standards. Atlanta has the same record as AZ, beat a bad team, and still benched Cousins. A little different situation as they drafted Penix, but still, good QBs need to produce. You are correct that Kyler has the ability to change the narrative around his play in meaningful games, but that isn't done by beating a 3 win New England team.