I don't understand how you can just practice and not compete.
If you don't compete, why are you practicing?
Where is the motivation to improve your game and test it underfire?
You can can get all the ingrediants together in a bowl and do it over and over, but it isn't a baked cake until you put it into an oven and bake it.
Competition is the only test of how well you succeed in practice.
Now, and I hope this doesn't ruffle anyone's twinkies, maybe competition is being avoided because that is when the opportunity for failure exists. Fear of Failure is a powerful emotion and can keep players at the practice table for the rest of their life, content like an old retired bull, just grazing and not looking twice at the heffers.
IMO, I want to keep testing and even if I fail, I will not because of 'ring rust', or fear of failure.
Practicing is more fun than playing in league. For the most part you don't have to listen to all the noise. You don't have to deal with the people trying to distract or otherwise shark you or worry whether or not you have enough people on your team show up so you don't have to forfeit.
I don't think it's fear of failure, I've thrown away many games and matches out of boredom, frustration and felt fine about it. I just don't feel competitive. That bothers me sometimes but I don't have a cure for it.
It seems that winning means something to you and that's probably a good thing. For me win or lose it's the same emotion.