Weakness?

Why is it that it is so difficult to focus on what we do well? I think it is because society today only focuses on what we don't do well beause we always need to improve. By focusing on what we don't do well, we see what we're not good at, and see what we need to improve on.
Society always wants us to be better than we are. Our strengths sometimes just aren't enough for everyone. Our weakness are shown for people to critique, and supposedly make us stronger. However, that is not right. Pointing out weaknesses can be a very damaging thing to do. It can hurt our self-esteem rather than make us stronger.
Obviously what we do well is sometimes going to be hard to focus on. Take for example Peyton Manning. In Sunday afternoon's Divisional Playoff game against the San Diego Charger's, Manning threw for over 400 yards and 3 touchdowns. But, because he also threw two interceptions and lost, the game is a failure. Had he won that game he would have been praised for having such great game. Because sciety points out his flaws, he is criticized for losing.
It is hard to focus on what we do well because everyone wants us to improve.