I get that. But with Radulov it's a little different because they're not losing a roster spot to a player brought in on trade. That happens a lot in the NHL and while it's got to be demoralizing, it's part of the business.
With Radulov's return, they're losing their roster spot to a guy who was under contract but ran to the KHL for more money until he felt like coming back. To me that's going to add some extra sting to losing your ice time.
Also in the Quincy trade it was out of his hands. He didn't have a say in being traded to Tampa Bay and didn't have a say in subsequently traded to Detroit. Radulov on the other hand bolted of his on volition, let the team he ditched go through the grind of the first 70 games of the season and getting the Preds into a playoff position, and shows up playing the white knight (at least that has largely been the media's portrayal) to save the day and help the Preds advance through the playoffs.
Additionally, Quincy's being added to the Wings happened in the ordinary course of business while Radulov's did not. To me it is apples and oranges comparing the Quincy and Radulov, it would a much closer comparison to compare Radulov's actions to what Selanne did when he sat out a good portion of the season a few years ago contemplating retirement.