It's hard to express how much I hate FB without sounding like a hypocrite -- all arguments of which will be somehow related to Google ultimately. But what it really boils down to, for me, is I can look at Google and see a corrupt company (redundancy if there ever was one) but not see the sheer scale of evil you get with FB and its userbase.
But maybe Google's various sites, apps, and algorithms are just far better at putting stuff I actually like in front of me, and most of what FB throws at me offends me. I can't even deny that it could be just that, I don't have the resources to test it. But I tried FB a few months ago for a couple hours -- learned that everyone I'm related to is a Trump supporter who wants to murder brown people, gays, and atheists -- never-mind that I'm two out of three. And just -- not going back there man.
But what strikes me a obviously evil was -- I had never been on FB before, but they had LOADs of relevant information on me when I opened an account, in all sorts of ways from showing me people I knew in college to recent posts of my favourite artists, whatever -- that's scary on it's own. What's terrifying is when you get shown everything everyone you've ever known has said that would enrage you -- but I went and got my mom to show me her FB experience with the same pages, it's nothing but freaking dog pictures. So if I had tried to say "I'm done with Jimmy, he's a goddamned homphobic asshole." becuase I saw dozens of anti-gay pots from the past year, my mom never saw any of that, and she would not have believed me except I showed her the actual posts from my account.
There's is something so beyond fucked up there, and it's legitimately scary. FB does not just allow for, but creates worlds of alternative fact sets, while leading you to believe you see the entire picture just because of how big the picture you do see is.
So yeah, I don't use FB. Ever.