I thought the playoff loss thing included him screaming at them before Game 5 saying "you guys are going to lose this series, and when we do it's all on you - I'm not going down for it." Keep in mind, we were up 3-1 and had won both games at home without MacInnis, and Q is yelling at them about how they were going to lose the series. And then after each of the losses in Games 5 and 6 he'd berate them and remind them "I told you guys, you're going to lose the series" and after Game 7 he rips them all one final time.
The locker room thing in 2003-04: I always heard it was simmering from the 2003 playoffs and who'd done what (or not done what) to help the team win. [Weight had a monster 5-8-13 series, Pronger was 1-3-4 but scoreless in the final 3 games.] At some point - the early December near-loss to Detroit? - Weight and Pronger really get into it again, and at some point Q tells everyone ""I'm not fixing anything, this is all your fault" and brings up the 2003 playoffs again, berates everyone with 'pathetic' and 'losers' and other such words, concludes with "so you all figure out who you're supporting, this is all on you guys - I'm done with this shit" and goes back to his office. From there until he got fired, most of his time around the team he spent in his office, only associating with the players when he had to.
I don't care if he won 3 Cups with Chicago. I wouldn't care if he'd won a dozen there. I've got zero use for him here.