Your personal life, your professional life, and your creative life are all intertwined. I went through a few very difficult years where I felt like a failure. But it was actually really important for me to go through that. Struggle, for me, is the most inspirational thing in the world at the end of the day - as long as you treat it that way.
To be a champion, I think you have to see the big picture. It's not about winning and losing; it's about every day hard work and about thriving on a challenge. It's about embracing the pain that you'll experience at the end of a race and not being afraid. I think people think too hard and get afraid of a certain challenge.
At the end of the day, you are solely responsible for your success and your failure. And the sooner you realize that, you accept that, and integrate that into your work ethic, you will start being successful. As long as you blame others for the reason you aren't where you want to be, you will always be a failure.