Let me back what I said up just a bit. Of course they want an elite defense, but they seem to be willing to sacrifice some yards for turnovers and opportunities. Not necessarily play reckless, but to mirror the style of their offense.
The Offense will have its 3 yard losses just to be followed by a 55 yard td run. The Defense will give up two straight first downs to get the interception. This is how they want to play. They know if they are humming on Offense; three turnovers can put a team away fast. This then allows the Defense to play more free and continue to take chances for more turnovers. This is where the "no fear of failure" comes from. Now that the offense is not working, the fear of failure has totally come into play, because they did not expect to see the offense regress this much. This is where it is on the coaches to learn how to do their job when things do not go the way they planned.
I am almost positive that this is what has gotten us to this point. All the other culture stuff and buy in is a by product of what has transpired from here. Guys checked out because their own expectations weren't met and the season is already incredibly disappointing. Also, you hear a lot about the older guys regressing or going back to their old habits. Well it's because this season looks too familiar to them. It was so easy for them to regress, and how do coaches get them to stop when they too are learning from this.
For the record, I am not happy about this. I just think this is exactly whats going on.