Also, people die. I already get from time a reminder of the birthday of somebody that I know died. That's creepy as hell and it's only going to get worse.
In my opinion the only redeeming feature of Facebook at the moment are private groups, but that in my opinion is not enough to sustain a social network, since many are moving to WhatsApp, Telegram and the like.
I deleted Facebook last year. At that point, I had 420 friends, 10 of whom were dead. One of them I discovered was dead while going through the list of all my friends making notes of who they were. This was despite numerous posts on her wall about her death. The damned algorithm didn't bother to show me that bit of news.
I reflexively answered the poll with Facebook because I hate it, but then I realized that I'm probably closer to killing my Netflix account than my Facebook account, and I doubted my answer. Now you've convinced me again that Facebook is most in decline.