The national Democratic Party decided to not penalize New Hampshire in any way, and accepted 100% of their delegates instead of reducing them by half.
In protest for New Hampshire being allowed to violate the rules without punishment, Michigan then also moved our primary date ahead in violation of the rules.
The national Democratic Party then decided to penalize Michigan by not counting ANY of our delegates.
Candidate Barack Obama then decided, all on his own, to remove his name from the Michigan ballot. Consequently he received zero votes in the primary.
Later in the primary season, there was an effort to redo the Michigan primary since the first one supposedly did not count (and was allegedly marred by the absence of Mr. Obama's name on the ballot). However, Mr. Obama actively fought to prevent Michigan from redoing the primary, and ultimately he succeeded in blocking it.
In the end, the Democratic Party decided to completely ignore the will of the voters. They simply awarded Michigan's delegates as they saw fit without any regard for the election results.
PS: On second thought, if you are a Michigan Democrat and you voted in that primary, then I kind of appreciate how you feel. You actually were disenfranchised, in a sense, by your own party in that case.