Burns, Meier, Karlsson to name the big ones, all bad in their own way. He's made some smaller trades that have been bad too or a wash but you need to get back better returns for big players. The trade I'm most understanding for was the Meier one considering the circumstances but still not the return you would expect for a very good forward in his prime.
I don't think Burns, Meier, or Karlsson were actually that valuable as
assets, which is what determines trade value.
Burns was a 37-year-old defenseman with three years remaining on his contract at $8 million apiece, who was no longer performing at a game-breaking level offensively and whose defensive liability is well-known. He wanted out and had a near-full NTC.
Erik Karlsson was a 33-year-old defenseman with four years remaining on his contract at $11.5 million apiece, and a full NMC. He just had one of the most extraordinary seasons by a defenseman ever, and has long been a game-breaking offensive player, but he had also been hurt for the previous five seasons and isn't great shakes defensively either. He wanted out, but there were almost no teams that could afford him and he could pick his preferred destinations, and Sharks ownership apparently wanted to limit the amount of money retained.
Timo Meier was a 26-year-old winger on an expiring contract, going to be an RFA with a $10 million qualifying offer.
Meier was the only really good asset, and he brought back a late 1st, a conditional 2nd (potential late 1st), a good prospect (Mukhamadullin), a mediocre prospect (Okhotiuk), and a mediocre depth roster player (Zetterlund). I think that's about market value for Meier as an asset.