Chuck Berry hates to listen to his own records. Certain movie stars hate watching their own movies. I once spent a year and a half avoiding the print version of an article I published. Finally I read it. It wasn't half bad. In fact it was good.
Have you re-read yourself lately? If you are down, it might cheer you up. A few nights ago I got caught up re-reading my own books. I thought, "Man, I said that really well! It holds up! How did I do that? Can I ever do it that well again?" and although I know I could, given the same situation, for a few minutes I doubted it.
I'd say that was my own weird thinking, except I once interviewed a sitar genius named Imrat Khan who said he thinks the same thing when he listens to his own recordings -- that he could never surpass what he's already done, that future work will somehow be lacking.
These are fears, and fears have no existence apart from their host. Maybe Chuck Berry, 82, focuses on the future, not the past. I do appreciate the past for things accomplished and lessons learned. But a focus on the future -- even if it's only a contest deadline or writers' gathering that's coming up -- is a definite plus for the mental health of artists.