Nobody is perfect but EVERYONE will have moments of "inspired brilliance." Every shot will go in, every ball will be hit, everything will be wonderful.
But it doesn't mean you won't suck sometimes. No matter how hard you try to prevent it, we all will have off days. And you'll feel like crap. You'll think you have let your team down. You'll think you have let yourself down.
The great thing about performance is that it's not static. There is always room for improvement. If you compete at your highest level, there is no "working harder" after a loss, because you'd have worked that hard every day before that. That's where you want to be: at the height of your peak performance. This way, when the inevitable valley comes, you'll be prepared to fight like hell to get back to the top. And it'll be easy.
Don't be dismayed and discouraged because it comes easier to other people. "It" is different for everyone. Their talents are different than yours. God made you into a unique, special person and He wants you to find your individual talents and make them your own. He also gave us the ability to be great at anything.
But when someone says you have "it," they know. Be that person.
Sometimes, it just takes a little bit more work. Ok, a lot more work. But every rep, every shot, every little thing you do is making you better. Either you're getting better or going nowhere. Don't make excuses. If you preface everything you do with, "Oh, I wasn't trying," guess what, you'll never win.
Practice! It'll pay off before you know it. And have fun, no one likes a sourpuss. Dance. Laugh. Smile. It makes those grueling hours in the gym a little easier to stomach.
Inspired brilliance is the side effect of believing in yourself. Luck is the side effect of skills honed to perfection in practice. Train until there are no contingencies, no defenses, and nobody who can stand in your way. WinForever.