Quitters never win and winners never quit, but we're not all born with Gretzky's talent and also: if you never win and never quit what does that say about you?
Get the idea out of your head that people are on the outset better than you. You're always going to lose with this kind of attitude you have, though. Even if you won I don't even think you'd know it.
What if Gretzky never got better? What if no matter how much pushing and training and practice he never scored a goal? I'm sure there are many people out there like that. I happen to be one of them.
Then he's doing something wrong. If you spend hours upon hours doing something, you will get better at it.
If he had legs and arms he probably would have won and gone much further.