I do think that Kreider being named dropped threw everyone for a loop and the Trouba stuff became a distraction but that stuff really only festered because the team wasn't playing well. I don't think it was THE reason they sucked, but it just allowed things to snowball and when things are that miserable, it's tough to break out of it.
The fall off in their play directly correlates to Lindgren being thrown back into the top 4 and right next to Fox shortly there after. It threw off the balance of everything on the back end and of course, giving a bad player big minutes is not a good thing.
It's not entirely on him (The entire top 6 outside of Reilly Smith has underperformed) but that was the true catalyst, not hurt feelings. If they were that pissed then why did they get off to such a hot start? It doesn't make sense.
Switching things up systems wise has made the difference lately as I don't think anyone on the team is playing way better now than they were a month ago outside of Carrick, Edstrom and probably Zibanejad. Other guys have pretty much been what they've been all year..
Lindgren has found a way to be even worse.