I started a new account on Twitter just to see what it's like. It's completely unusable. The place is filled with shit content that a I don't want to see and bots. Not sure what competitive advantage you are talking about.
I will rail on FB just as hard as the next guy, but realistically, from a business perspective, if facebook's wild popularity and 3 billion active monthly users still says "unusable" to you... well, do you really think most people would agree with you? And more importantly to the company... whose opinion matters the most?