Unless you've lost a limb or your eyesight, if you're relatively healthy and you lose your starting job to Kwame Brown I'd say you've hit rock bottom.
At this point, Darko has to have earned the "bust" title. I say at this point because he was so young when drafted and didn't get any PT in Detroit. It's only fair he gets some years to mature and some time on the floor to develop. Well, he's had that now and much like Kwame, he just plain sucks.
Can you imagine if Detroit would have drafted Bosh or Wade instead?!? Oh my. Dumars has done an incredible job, IMO, and doesn't get enough credit. And it's easy to play the "they could have drafted X" game with 20/20 hindsight. But man, Detroit got screwed by picking that waste of space.