the Teddy fans fell off the wagon really quickly when it became clear he wasn't able to win. If you watched the games, you would have seen that the team out performed their talent level and expectations.
you can also see how this organization is vastly different from those of the past by how quickly they cut bait with Teddy. he wasn't they guy, so they kicked him to the curb immediately. if Darnold struggles, he'll be out the door, too.
so yes they have created a winning culture. it's not about making people feel good, it's about step up or go somewhere else.