The problem is that we do not know what we would have gotten instead. Before Facebook (et al.) became big, more of my regular friends/family were on Jabber/XMPP. People were creating blogs that were not locked in a silo (Wordpress and Blogger were quite usable for non-experts). Etc.

Now with facebook, I lost touch with people who refuse to be on FB(privacy concerns).

And forget about making friends with strangers on Facebook (gasp!)

Slightly offtopic: we found that checking out Geocaches in an area on the Geocaching website is a pretty good way of finding interesting spots/places. Especially highly-rated caches and Earth caches.

Secondly, I've seen engineers running around with Facebook shirts on with the slogan "Connect the world" written on them, I would find it irritating if I couldn't see the irony in it, instead I just find it funny.

There is a lot of cognitive bias happening with people working there. They wave big money carrots to keep staff and I feel for some people it's a way of validating their ability, so they stay no matter what impact the product is having on society, even if they don't agree with it inside.

Change is not positive per-se. It can be just as easily negative. I had a Facebook account for exactly two weeks and realized this wasn't an improvement over what I already had. I much prefer quality over quantity when it comes to personal relationships and Facebook really does not satisfy that for me. Besides them being absolutely creepy about the way they position themselves and use the mountains of data they gather about people.

On top of that Zuckerberg seems a thoroughly despicable person which doesn't help in trusting the company that he leads.

Livestreaming a murder is not progress.