Don't quit the game just because you haven't learned your true talent (ohh wait...too much ponies).
Lemme rephrase that: Don't quit just because you haven't found what your good at in NF.
Not everyone is a great BB player, not everyone is a good CV player, and very few people are very good SS players.
I used to be one of the worst players on my server (New York), but after lots of grinding, reading guides, testing, trolling, and battles, I have become well recognized for both my unhealthy obession with My Little Pony: Friendship Is Magic, and my ability to BW effectively.
In a nutshell, just keep at it, learn from the mistakes you make, and enjoy it, it's a game.