Why is tennis so frustrating?

it depends on how to look at it but in this video we are trying see the things by loser's perspective

game of frustration,tennis rage,tennis failure,worst tennis shot,funny tennis,funny sports moments,tennis joy and frustration,A game of tennis is equal parts joy and frustration!,What makes tennis so exciting?,Why is tennis so frustrating?,テニス,珍プレー,珍ショット,面白いショット,おかしなショット,イライラ,笑えるショット,