I have always liked my Smith brand knife sharpener. It works on everything up to D2 and is not that much money. I was never able to master the art of flat stone sharpening. One of these days I should probably get a soft knife and learn how.
The other thought is learn how to live with your knife. My knife stress test is using the knife for a month. I quickly learned what I liked and what I didn't. Where I could carry and where I can't. \
I am still learning.
One day, I shall come back. Yes, I shall come back. Until then, there must be no regrets, no tears, no anxieties. Just go forward in all your beliefs and prove to me that I am not mistaken in mine.