>>The actual human connection features of Facebook turned out to be a novelty<<
I don't agree. FB play(ed) an important role for me: helping me keep my extended family across the goings on in my child's life (they all live elsewhere). It was quite good at making grandparents/aunts/uncles feel connected etc.
But that utility is largely buried beneath a growing list of 'features' with little appeal - I don't need prompts to add people I know. I don't need yet another marketplace. I don't need short-form videos from complete strangers.
Today, 80%+ of my newsfeed feels like irrelevant content - and that's what's killing FB.