I’ve had similar issues and recently made a big step forward by doing one thing: I publish my posts but don’t list them and block search engines from scraping /posts via robots.txt.

It’s not a safe way to hide content by any means, but is just enough to stop myself from worrying about what others still think about my writing. I can still share links with individuals if I want.

I have been trying to get myself to write more for twenty years and this was the first thing that helped.