Earlier quoted context omitted.
A local media company runs a "classifieds" on their online site. It dominates locally. Craigslist has been worthless for ages here because of it. However, Facebook Marketplace seems to be slowly gaining traction. Which I hate for all the reasons you mention. I dread the day it takes over :(
Facebook Marketplace has completely taken over in most parts of the US. It sucks.
But there's one simple, guiding principle that I'm always following. And that's refusing to reactivate my FB account.