I've hidden/blocked quite a few people on FB to maintain my sanity. I use it mainly to chat with my friends on Messenger.
Yea. I still use Messenger as well. Simply because some of my friends have no other way of contacting me, unless they send me an SMS text (or actually ring me). I like the fact that on the smartphone I can open messenger without going through FB first.
But, as I am a moderator on a couple of LGBT Support FB pages which are linked to me through my personal FB account, I still sometimes have to log in to my personal account to get to those support pages when Messenger informs me that someone has sent a message to one or other of those pages.
But I deal with those messages and immediately log back out of FB again.