Those kind of emotions are played out In competition every day in all types of ways. The only difference with this programme is that more people are seeing it.
My son has been in competitive sport since he was 5. It was always his choice and, at the beginning of each season, he was asked if he wanted to sign up again and it was always his choice.
I'm glad some of you didn't get to watch him though. Frequently having tears of frustration, anger at himself for not doing well, elation when he did, self doubt and lack of confidence "I won't get in the team" "I'm rubbish at this" "I'm not good enough" "he's better than me" are constant feelings in this house even now and he's now 15.
It doesn't matter that last Sunday he was brilliant, the man of the match, adored by everyone - that will be forgotten (by him) in an instant if this Sunday his performance wasn't as good as last week. It's his pressure to deal with, he is competitive, he wants to do it no-one is making him. He can walk away anytime he likes. He would be horrified at the suggestion that he shouldn't play because sometimes it's stressful.
And he is not unusual. Other parents report similar scenarios after each game.
You cannot make assumptions about a child's mental health based on a very edited tv show. Nor should you.