This is difficult without context, but first I'd replace "never win" with "haven't won yet". And even if you haven't won yet, you've surely learned something along the way (even if it's what not to do). Can this knowledge be used to try again more effectively, or to try something similar in a different field with a higher chance of success (or less risk)?

You wouldn't ever know, because it would mean being persistent up until the last moment of your life.