Can you explain how?
He's made the team worse, and mortgaged the future many times that resulted in no real success.
The only bad move I can think of is the kick at the bucket Eric Staal trade.
Traded Brassard for Zibanejad
Traded someone for Raanta
Traded Stepan & Raanta for #7 and DeAngelo
Traded 4th for Holden (had a great season)
Signed Grabner (had a great season)
Signed Vesey
Signed Desharnais (having a solid season)
Signed Shattenkirk (on pace for 65 points)
He's building for the future while keeping the team competitive. Many on here will disagree with this philosophy but I think he's doing a great job at it, especially considering tearing down a perennial playoff team is totally unrealistic.
His value signings/trades have been great, and the Zibanejad trade speaks for itself; brought in the young #1C with a complete skillset and huge potential that everyone on here has been clamoring for for years. The Stepan trade is also a big win IMO because I do not think this team actually misses Stepan very much. DeAngelo looks like a good young player who fills a big need, and that was our highest draft pick in over a decade. Raanta was acquired for nothing and then is later packaged for a top-10 pick. Smith trade I liked a lot too, how well the contract works out remains to be seen.
Getting younger, some great trades, and elite dumpster-diving make for an excellent GM in my eyes.