All remotely popular online public spaces are completely infiltrated by bots/propagandists/trolls/morons/etc. If you could successfully filter that type of content out you'd end up with a much larger pool of valid/authentic content to access than if you abandoned the space altogether and switched to some very obscure/niche space that's yet to be manipulated.

You can already follow who you want on Twitter. The thing is, bots etc take their toll even on the good users.

Bluesky has a default feed that is just the posts/reposts of the people who you choose to follow, in reverse chronological order.

No need for an algorithm to decide what is worth seeing.