After quite some exploring around and struggles I made my peace with https://raindrop.io. Am I happy with that? Of course not. But that's the only hosted one which has extensions and apps for almost every browser and OS I use. I wish there a functional open source service (hosted) with wide range of platforms support that I could pay for and use.
I agree, I made my peace with Raindrop.io as well. Being able to use it on any system and most any browser, plus a full API for interacting with my bookmarks. Nothing free and open source compared and now I have 6k+ bookmarks in Raindrop that I would like to move elsewhere, but I'll have to check out the project linked here.
I made an app for this actually, called Showcase. You can bookmark any content——Youtube videos, websites, Tweets, Instagram posts—— and store it all together. You can use it on browser where you can paste directly onto the canvas (+ chrome extension coming) or iOS that has a Share Extension too.
