I deleted my Facebook, Instagram and WhatsApp accounts just this weekend. It's not that I don't like the service Facebook provides (I liked Insta in particular), but I don't want to be a part of the data harvesting, privacy destroying, democracy usurping empire any more. I don't believe Facebook has your best interests at heart. I don't think Facebook is good for society.
Also I read recently that they have a crisis internally amongst their staff with employees considering jumping ship. Additionally, new graduates no longer consider Facebook as the premium place to work. This may start to hurt them in the coming years.