Irrelevant trades are irrelevant.
Getting Nick Suzuki, the best #1 center this club has had since Vincent Damphousse (and he may turn out better), overpowers any minuscule wins or losses in the myriad of other trades the Maestro did.
Losing Sergachev for Drouin, a gamble 50% of the people agreed with at the time, is not really important. Sergachev is good but overrated. I wouldn't trade Guhle for him, for example. Not by a long shot.
So the long-term damage it did to the club is not that bad. Meanwhile getting Suzuki illuminates the sky for the next 15 years.