The problem is scale. Trying to replace something big like Reddit/Browser/some-huge-library requires enormous resource investment which is inviting the same forces that enshittified the original. The original reddit was a link list with voting, no comments/media/etc it was cheap, and as it grown into social media giant with insane complexity, it became much more expensive and slower to process(both on client and server). But the users loved it, they now don't need to host the video/image/comments elsewhere, its all included inside the walled garden, and reddit which was 100% links to outside resources is now mostly self-contained media with pictures, videos, blog posts(self.subreddit) being most of content and hyperlinks to "outside" being mostly mainstream "big websites" with social clout.