It could be argued that Doomhammer would be better off dead, though, that Tur would rather see the orc humiliated, to break his spirit (and body), to let the orc know that he lost, that he failed, and that his people would be slaughtered/enslaved.

But, on another page, Tur is too succesful. I think that's my beef with him, so to say. The only time where, as far as I can see, he made a mistake, is when he let Doomhammer live. (Though he could not know that, and it turned out to be good for Azeroth, but it was pretty bad for the Alliance when he escaped, and aided Thrall etc.)
If he were the main character in a series, it'd get stale. "Ok, he's brilliant, a good fighter, he can overcome his flaws, and he's an all-around good, decent guy. Oh, and he's in a relationship with an elf, even though he's human, who was at the time immortal."

I dare say that even Knaack might make him better. But, this could be because we don't have enough story about him, so that we just didn't have time to see him make a mistake.

Whatever, I like green, you like red, and the word keeps on a-spinnin'.