Facebook has damaged our internet like no other service ever has. It has immensely damaged the fundamental structure of the internet, the decentralization. Now I'm sure that most people will base their opinion without considering the technical aspects. A massive social network isn't a bad thing. But a massive social network controlled by one single entity driven by economic interests really, really is a bad thing. A social network needs to be distributed. Nobody should be able to hold total control over the whole network or the information that exists inside it. Any decisions that affects the network shall require each entity to implement those changes (read https://en.wikipedia.org/wiki/Distributed_social_network). It will take years before anything remotely good will come out of social networking. Facebook will eventually die though *happy*.
I personally use facebook to stay in touch with family half way across Canada. I'm not on too often, and I'm aware there are other sites I could use, however they are already on facebook and I wouldn't feel right asking over 100 people to switch. I do understand your valid point though!
I do not think many people like facebook, people get used to it over the years. Many people use it, because they have not choice.
Facebook has one positive feature IMO and that is sharing photos. I rarely use Facebook for personal reasons except to monitor my teenagers but I have become very, very familiar with it and how Facebook operates. I work for a school district and one of my jobs is to monitor and remove school related Facebook pages. A few months back, someone created a cyber bully page with one of our high schools logo and name. It took Facebook 3 days to remove it after we had every staff member and their mom report it. At least Wikipedia has an IRC Chat to get help whereas Facebook sends you automated messages or no response at all so you never have any clue what's going on.