Maybe you'll like wiki.vim (not to be confused with vimwiki). I, like you, tried a lot of solutions, and it's the only one that's really stuck over the past couple of years. I think it's because it doesn't try to do too many things and is just a thin wrapper over a collection of text files (you can specify to use Markdown). Obsidian is fancier but I find that I've been able to replicate most of what I need and don't miss the extra bells and whistles.

Oh, and I've found using a tool like gitwatch really helpful for keeping the repo synced without having to remember to commit.