While I'm sure FB's algos are somewhat to blame for this, it's hard to estimate just how much content has been driven away by the site since the halcyon days of 2007-2012. Most of the reason I left was because none of my friends posted photos or thoughts any more -- folks just started sharing links and regurgitating talking points without generating any original content, so I left because I have HN/Reddit for that (with better curation tools, at that). Facebook was a good place when all of my friends used it for messaging and sharing their lives, but at some point everyone I knew started to use instagram and snapchat for those things.

Snapchat has mostly been killed by monetization, but instagram is still on life support for now. Losing the chronological timeline was quite the blow, though. Is it really that hard to balance "pleasant place to share my life" and "shove ads into my face"?