Btw I know this regret from experience.* I was in the corner for a state quarter-final, and my guy executed a series of idiotic mistakes that lost him a 7 point lead, the match by pin, and team points that would have likely got us a team trophy. In disgust, I threw my glasses into the wall and had to walk around blind the rest of the tournament. My AD never let me live it down.
*Except it wasn't all over tv, twitter, and instagram.