I don't know that Davis wouldn't do whatever it takes to stay, but call me fucking crazy that sounds like something you deal with when the season ends.
But, then again for me I don't find Jerry Richardson dying to be a palatable part of my plans either. Waiting for him to die or anticipating when we'll cut Beason years from now isn't something I buy a whole lot into.
If it were me, as I've said for nine years now, I'd have no problem moving Hurney to an oversight position, if that meant getting a better personnel guy in. Then move from there. I'm honestly a little surprised that didn't have a chance when Billy Devaney was let go as Rams GM given the history between he and Hurney. That's not where I'd go, but it would make some sense organizationally.
But, to the original question - which of the three? Hard to say. It's not a matter of motivation, but I would say this team is moodier than I've seen in a long time, too.
I think we have some good talent, but there are obvious holes, and as much as I wanted to believe Norman was above average, he's playing to his draft position - we have two one-dimensional DTs that don't work in the same direction. I find those to be two massive holes that kinda work together to fuck you, and while there are places we have a lot more depth and talent, I don't know I've seen the efforts of that on the field (Murphy at WR, our general struggles at LB, inevitable upgrade at S and the kicking game as a few examples).
And, I'm not thrilled with coaching either - I don't believe that Rivera needs to be a fire-breather, but ultimately he's responsible. I had my concerns about McDermott at times, and Wilks hasn't made the difference I hoped so far. Chud is obviously overthinking this, creating a bunch of college shit when we can just throw the fucking ball well when we're not down 10+. And I definitely wish we'd dropped Murphy.
So no one particular thing, really. Team sport, team's to blame.