So much time is spent to try and be the best at something, only to run into that person who is better than you. How harsh the world is to never let you be perfect.
The lesson lies in that though. If you strive to overcome everyone around you, there will always be that person that comes up and out performs you. Competition provides fleeting satisfaction.
I do not say to not do it though. Stop competing with others and compete against yourself. Raise the bar only against your own skill, not that of another. If you pick up a guitar and can only play one note... Play it for yourself, play it until you hit it perfectly every time, play it and find peace in it. Tomorrow... learn a second note.
Never let the challenge of others being better than you exist. You need only concern yourself with the challenge of One vs. Self. As you gain more experiences, you can overcome fear and doubt.
What do you have a passion for? It doesn't matter how unimportant the world sees it. It only matters how important it is to you. Own your passions, pursue them, and perfect them. Then one day, you will look around and realize you are finally the best person at something that matters more than anything else;
Something that matters to you.