Honestly, I'm more inclined to agree with Gurgs' take regarding the Karlsson trade. At the time, I was all for the trade and saw no downsides in it. And even now, I don't think there is a ton of downside because I bet they get a 1st back for Karlsson in the future. But I think this team showed last year that it's no longer a team you spend a 1st round pick to make better.
I don't mind the trade at this point because I think you get a 1st back for Karlsson in the future. But I think there's an extremely easy argument to make that they were better off not doing that deal and just eating the remaining years/money on Petry, Rutta and Granlund.
The Karlsson trade really was a "four quarters for a dollar trade". We got rid of a lot of junk at a cost and brought back someone we thought would help more than those we traded away. I think in a nutshell, we can all say that we thought that would be the case. How well it ended up working is still up for debate. Karlsson was okay. Not bad, not great. Just okay. He has another three seasons to change things around and be an impact player. Petry wasn't going to help us. Granlund most certainly was not going to help us. Rutta, whatever. I don't think we would have been any better or worse off.
At the time, I get why Dubas wanted to make that move. Hindsight is a great thing as it's always 20/20 and while it's hard not to use it to judge a trade down the road, we really have to judge it at the time.
Brassard trade - great trade at the time. In hindsight, not so much.
Gudbranson trade - bad at the time, bad in hindsight.
Granlund - bad at the time, bad in hindsight.
Pettersson - meh at the time, great in hindsight.
Marino - meh at the time, great in hindsight.
Hornqvist - bad the time, good in hindsight.
We can alter how we feel about the trades down the road, sure, but that doesn't mean I'm going to knock a GM for not having a crystal ball. If they did, you wouldn't see the Matheson and Marino trades that necessitated having to trade away Petry, Rutta, and Granlund. If we want to be mad about it, let's start at the root of it all.