I stopped using it due to the fact that it is like Vim for Microsoft Word, it takes more time to use, has less features than the original and hurts your sanity

If you just want a knowledge base in Vim, have you tried Vimwiki[1]?

I use Vimwiki in vim and Obsidian outside of Vim -- they can be configured to use exactly the same pile of Markdown files as a vault/wiki.

[1] https://github.com/vimwiki/vimwiki