Great story.
As I commented in a similar post, it is not what is said but how it is said.
Most of us would be on defensive mood every time we perceive criticism coming, but depending on how it is offered or given, we may end up thanking that person for a timely and constructive feedback.
It is very easy to scar an ego/self-esteem. Some harsh words at the wrong moment in the wrong place may be enough to handicap anyone emotionally.
In sports, where according to some experts mindset is more important than physical skills, we can see the effect of criticism or lack of it more clearly.
Thanks for sharing your story