You did not elect Obama. The major news networks, in combination with the major holders of political and economic powers, did - by allowing you to be aware of a few handpicked candidates, and regulating the stories spinned around them.

If they did not want Obama in office, you would not even have seen his name anywhere on screen or in print.

Democracy in its true form has never existed in history as it is not really sustainable for many kinds of reasons, that all lead to disasters (people tend to vote for what is only good for them short-term leading to long-term losses, too many different groups arguing over X and Y and Z leading to stand-stills, etc).

I'm not saying we have it good right now, but it was for a while (last 150 years). But nothing lasts forever and eventually all systems decline and collapse.