People know how I feel about Gardiner and Dermott.
With that said, the issue I see on the ice isn't the defensemen. It's the constant shortcuts taken by our forwards. Almost across the board. With Andersen in net and Gardiner and Dermott on the ice for us, we hide some of that. Gardiner with his skating can close off a lot of space that our forwards leave open, and Dermott can close gaps with the best of them. If that doesn't work, Andersen often bails us out. But our d-men tend to look worse than they are basically because they are put in a more difficult position than most d-men. I've watched a ton of LA games over the years. Muzzin is a great d-man. Without a doubt a top pairing guy. But he is used to support. He is used to having somebody in close to help him if he can't quite control the puck. He's used to a team that works its way out of situation, whereas here he is expected to take the puck, get the space, and move the puck up fast. That's a tough job under pressure.
The root problem here is the stretch passing. The team is expected to stretch out the ice. They want the puck up high quick. If it's a tip in, they need the second guy to already be rushing up the other boards to get it. If it's tape to tape, they need a second guy with speed in support, coming up the middle. They need to make great reads on when to go already from the point where the d-men turn up ice to search for the stretch play. That's also a difficult read, since you need to make it that early, and if you make the wrong choice then the consequences can be dire.
The stretch play is effective when it works. It really is. But is it worth it? I don't think so, especially not when we already struggle with our cycle defense. That's my impression at least, but I'm also just an amateur.