I don't think he was weak minded. I can kind of relate. In my senior year of high school, I finally qualified for the state tournament in wrestling. Got my *** kicked in the opening match. Did better in the consolation bracket but still lost. Didn't place. When the realization hit that I was never going to achieve what I wanted to achieve and I would never have another chance to do it, I cried. It hurt. A lot of sacrifice in training, trying to maintain nutrition and strength without gaining weight, the practices, the matches, the injuries, the travel, maintaining grades to stay eligible, all of it. It was tough to accept failure after all that I gave.
This guy stayed in school an extra year to try and win the things he hadn't won yet. He won't get another chance. I can understand.
On a side note, I take failure much better as an adult. It's more of a hobby now.