Play the game
Do you remember being told as a child, ”It's not whether you win or lose, it's how you play the game?”
Well, that's just about the best advice for life that you can get.
How do you play? You try your best. You are honest. If there's a foul you call foul even if people disagree. And no matter the odds against you, until that last buzzer sounds, you just don't give up.
That's how you play the game.