I feel you, but iv'e played in many tournaments and the scene is cold breh.
People would pick Cody's worst match up even if they barely know how to play with them. Just simple bnb's and mix ups that my character can barely do shyt about.
Learning another character can also help you with the match up. Lets say you have trouble against Ken, if you learn how to play with him you'll realize his step kick range is where you always want to be. You can now incorporate that knowledge into your game when you play against him, and stay right outside of that range.
This is pretty much the only reason why I learned to play with other characters.
Lol @ the idea that I should stick to one character because my opponent doesn't have any other options...
You gettin on tonight? What's your XBL