I don't think people understand how bad Grunwald is as a GM. Let me summarize, again:
Grunwald traded Stoudamire for Bryce Drew and Mirsad Turkcan, then Camby for the corpse of Charles Oakley and Sean Fucking Marks, and Tracy McGrady for that French Guy That Isn't In Basketball-Reference.com's Database.
That's not really fair though. All those things you mention happened early in Grunwald's run in Toronto, when the team was in a situation where
nobody wanted to play here. It was seen as a total backwater, they didn't have a real arena, the team sucked, and they wore purple dinosaur pyjamas.
Damon Stoudamire - when Isiah left, Damon loudly demanded a trade. Grunwald didn't have a lot of leverage, but he got a couple of first rounders and Alvin Williams who wasn't a star but went on to be one of the best Raptors ever.
Marcus Camby - People forget, but he was a punk early in his career. He had a bunch of question marks over his head and when the Knicks got him people were pissed they'd lost a heart & soul guy like Oakley for a maybe. It's easy to look at that trade in hindsight, but it just wouldn't have worked out in Toronto with Camby and Oakley went on to be the backbone of the best Raptor team ever. There isn't much regret in Toronto over that one.
T-Mac completely fucked the team over, he verbally said he'd re-sign and then bolted in the offseason. This was before teams had the right to match after rookie deals ended. That 'trade' only happened because it was the mandatory compensation under the CBA at the time, the team had no leverage under the NBA rules. Life lesson: T-Mac is a dickhead.
Grunwald is well remembered as the guy who built the Raptor team that was one Vince Carter brick away from the conference finals. The team stagnated after that because Vince said he wouldn't re-sign unless Grunwald gave everybody else a deal and ownership saw him as their meal ticket so they made him do it. The team went into cap hell soon after.
Grunwald lost his GM role, and wound up as the President & CEO of the Toronto Board of Trade. He's a legitimately smart dude...
Then that same GM traded a first round pick for Andrea Bargnani,.
...though I'm imagining he was either raging drunk or Jimbo Dolan was pointing a machete at his head when this happened.