I wouldn't fire Sutter, but I wouldn't consider it outlandish if someone felt Sutter or DL should be let go.
The fact is a lot of different people share blame for the Kings current situation. The tough thing is, they're also the ones who got us to the cup.
The bad trades for Lucic and especially Sekera will hurt the team for years. You can say "not all 1st round picks turn out", but that's precisely why you don't give them up that easily because only about 1 in 3 really pan out and it's better to build a core through the draft than FAs. Blame DL for that.
I love Kopi, but he's not really worth his 10 million contract now, and that will probably be even more true a couple years from now, though I really hope I'm wrong. The blame for that contract goes to DL.
Giving Kopi the captains slot doesn't seem to have improved things, if anything it's done the opposite. The way it was handled and became known to Brown definitely wasn't cool. Not sure if DL or Sutter is more to blame for that.
Offense, especially the PP, continue to be subpar. That blame is shoulders by the coaches and most of the team, especially Kopi.
Of course, everyone above who deserves blame screwed up but they've also given us 2 cups. They're also at least trying, for the most part, to find a way to win.
The biggest unnecessary monkey wrench the team has faced falls on that POS Voynov. The problems he's created weren't in an effort to find a way to win like the players/staff above. His were much worse.