Dude, you have no sense of perspective. Kournikova, at one point, was the 6th ranked female tennis player in the world. IN.THE.WORLD.
How many other tennis players, female or male, or athletes in their sport, or workers in their profession, can say they were the 6th best at what they do ON.THE.PLANET in that profession at any given time? You think every tennis player in high school, college and or professional would have liked to have reached as high as 6th ranked in the world? Are you the 6th best in your profession in the world?
No, you think she was a failure because she didn't win something of significance. She did win two majors as in doubles and reached the semi-finals at Wimbledon in singles. Having played tennis in college, you think I would of liked to have reached the semi-finals at Wimbledon or won two doubles titles in majors? How many other tennis players would like to reach the semi-finals at Wimbledon?
Man, you need some perspective.
It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat.
Teddy Roosevelt