Have you forgotten the 2000 election?
From what I remember, we had a candidate who won the popular vote, and by any fundamental democratic standards would have been the winner based on that alone. We, however, do not live in a democracy- the United States is a Federalist Republic- and so it wasn't the people who would decide the next president but electors.
If you value the principles underlying democracy any more than you value an individual candidate, then this is a problem. Public opinion should define public policy, and accordingly we should have "one man, one vote," but superdelegates, like electors, interfere with this; the possibility that Obama could win the popular vote but Clinton the delegate count- or vice versa- means that the "best person" will not necessarily win.
This system is a threat to the ideals that are the namesake of the Democratic Party, no matter how this election plays out. To take a stand otherwise is a selfish abandonment of the high road which, in its infrequent appearances over the course of the past 8 years, has been the Democrats' only strength against a better-organized Republican Party.