>The problem instead seems to be a systemic one. i.e. What kinds of posts does the platform incentivise and promote as a whole? However, changing the system would require significant product updates and harm the bottom line, as it would likely result in lower engagement.

It took me an hour but I made FB enjoyable for me again by making it a feed that is just my friends in chronological order. As a bonus there is no good way for the system that decides what to show me to be gamed, I just bookmark this:

https://facebook.com/?sk=h_chr

Preventing all the groups and pages I had interacted with before from creeping into that feed was the time consuming but worthwhile part. I had to go into my groups settings & unfollow them all individually though:

https://facebook.com/groups/feed/

same for pages:

https://www.facebook.com/pages/?category=liked&ref=bookmarks