Very much the wrong decision.
The second they came across him, the expidition was over. They had to try. Simply helping him could have improved his situation to an survivable possibility.
This piece of human refuse is now going to sell his "me so special" book. He will inevitably use the excuse of being a cripple.
I bet the oxygen was given DESPITE his decision to abandon the man. The mental cripple was probably willing to just leave him with nothing.
Just simply horrific.
Evidently not. This happens periodically, and the math works out that providing "assistance" is not only futile, but dangerous.
Climbers assume a level of risk, part of the risk is the understanding that little can be done to help you should you become unable to help yourself under extreme circumstances.
Not like this guy was hanging out on the shoulder, in need of a lift to the hospital.
Expeditions are not equipped to rescue helpless, stranded climbers. The choices were either continue to the summit, or stop and climb back down. Neither involved rescuing anybody.