Facebook Usage?

There's this one day that I'm so curious of facebook that I decided to join. Upon joining, I try to look around and can't understand the goal of facebook. Ok I know I'm a little stupid. Actually what's the use of facebook? Can anyone enlighten me? In my opinion facebook sucks. Facebook originally are meant for college and university student. But it make it to the big league after some tweak here and there. And some people like you and me that generate income for them.

This is why I think facebook sucks:
1. A waste of time better of spend sometime on meaningful thing using the time.
2. It's fake! I give you a beer , you give me a beer. OMG what has happened to some real beer outing with your friends at a pub. gosh!
3. People selling themselves. Oh yeah. Comments such as Darn. I'm not that good in self advertising too bad =p. If not then I might be addicted.
4. Poke? What the hell is the poke for? It's so lame I couldn't believe they created this function whahhaha. Poke you poke there. OMG this sound obscene =p pardon me.
5. Wall? Isn't messenger more convenient? Ehem.
6. Those application. Oh gosh. I won't use most of them even if I have nothing better to do!!!
7. Too many profile for a person. Try search aoi sora in facebook, which one is her? There's so many Aoi Sora :(. Did she create multiple accounts? LOL

Please someone enlighten me!!! =p Sil vous plait!!!!