Personally I feel most strongly about Google, because I really believed the marketing back in the day. Took me a long time to get disillusioned, and when I did I felt all the worse for having been a supporter for so long.

Facebook is different. It's pretty hard to avoid using Facebook without being an outcast in a way, if all your friends and family are on there and they use it to communicate, schedule events, etc. There's also Facebook Marketplace which seems to have taken over for Craigslist for selling stuff locally. I'm one of those people who has an account there, but never actually posts anything, but I keep it because I have a few people who insist on using it to communicate; I've met lots of people like this.

Twitter just isn't like this at all. I think it's dumb, but it's easy to ignore.