1 Facebook is not a technology company. Facebook is a media (advertising) company.
2 Facebook, like most social media, is primarily dependent upon a business model formulated between 1998-2003. The business model is convince users to volunteer content to a central server, limit liability, and serve advertisements.
If you want to compete against Facebook and beat them at their own game you have to do a couple of things:
1 Take their market share
2 Make money
You will not win that game with a superior technology. You will win that game with a new and more durable business model, but sometimes new business models require new technology. Either way you have to be incredibly innovative and persistent, because most people absolutely hate original ideas.