Go check Notion.so. I've been on the same boat as you for a long time, tried all the open source atlernative I could find as well as the paid ones but kept coming back to plain-texting.

I read about notion a few days ago and it's been smooth so far. It's everything I've been thinking of for when "I'm gonna make my own note-taking app I swear". I'm looking at moving maybe a third of my notes to it and use it for a few weeks before I consider moving fully and paying, I guess. The desktop client is an electron app so that might be a turn off for some. But! There's a web clipper on their road map too so that's one point for them that always makes me look back at evernote.