Quoting: PleaseBanMeForMyOwnGood
Of course coaching matters but I don't see coaching being a problem in Montreal. When Montreal loses, it isn't generally because they get out played. It's because they lack the game breaker that other teams have. Against TO it wasn't that they were that much worse, Matthews and Marner just always seem to capitalize on their chances. Having a team of 3 decent 2nd lines has its advantages and disadvantages.
Against teams like TO and Edmonton you are going to get your chances and sometimes have the edge in chances but the problem is the guys behind your chances just won't ever be as dangerous as guys like Matthews, McDavid, Draisaitl, Marner, JT or Nylander. Which is why you are in a cold streak. Tofolli and Anderson are not going to score 30 goals this season. Over 56 games I can see the Canadiens having several 30-40 point players but likely no one over 50. Which I think will lead to more than a few stretches where you lose 5 out 10 where you were not at all bad but just don't score as much. And there will be games where you are clearly the better team but McDavid scores 4 points and you lose 5-4.
Blaming the coach for that is ignoring the big problem. Doesn't matter who you have behind the bench, the players on the ice are just lacking game breakers. In the North it's even worse since there are many in the division. TO and Edmonton and to lesser extend Winnipeg and possibly Calgary all have guys that can hurt you at any given moment. Montreal doesn't have that.
No one is claiming Montreal has game breakers or Toffoli / Anderson will score 30 goals this season.
There strength is there depth, but if the coach does not have players in the right positions to succeed well then it's not going to work.
KK playing less than 14 minutes a game.
Romanov playing 3rd pairing on his off side with Kulak and Mete. This guy is a top prospect and a rookie - wouldn't you want him playing with a veteran? Maybe a veteran like Shae Weber - who has been awful next to Chiarot this season, but they are somehow the two most used defenseman on MTL, even though Petry is having a Norris caliber season. Is a Norris contender not considered a game breaker?
They also have Jake Allen who is giving them Elite goaltending, yet they continue to give more starts to Carey Price who is one of the worst goalies in the league right now (based off Evolving Hockey's GSAx metric).
There powerplay set up is the worst part and they changed it while it was successful just because they felt the need to get Perry on the 1st unit.
If you want to dumb it down to they have no game breakers you can, you don't watch MTL game in game out to see the issues related to coaching decisions.