Congratulations! You’ve hit your mental barrier, one that tells you, “that’s it huh? At least I tried”, but you should do away with that blasted voice! Approach your character and your playstyle and ask your own questions, “If I get zoned, how do I approach. Do I dash, block, dash?” or “Do I get a life lead and just sit on it, playing the patient game?”
It sounds silly, but answering trivial questions like that help you understand how you, as a player; function, think, react, etc. Seriously, get your honest and best match and submit it to the Replay Analysis. The wizards there help you see things in new lights, or at least they provide critique and suggestions. It helps not only to see the advice, but to see yourself in hindsight. Like Dayv0 mentioned, look at yourself objectively and see what can be done differently.
I hit this wall too, believe me,
Took me forever (first fighting game, mind you) but I finally valued what I did good and what I did bad. Find your way and set yourself on the journey.