I liked him, and as I see it, he was redeemed at the end. Of course, they threw in the part about one of the former students killing themselves just to let you would know exactly how they feel about him, but that part felt tacked on and was never believable, so I just ignore it. But the single-minded pursuit of excellence and devotion to the craft should be admired, not condemned, and it's a broken culture engrossed in mediocrity that wants to paint his "type" as the villain.