Clinton's camp shot down the caucus idea (not that I blame them, it'd be easier to just give Obama 65% of the delegates in that case) but that was an option that would have been funded by the state of Michigan.
Sure, late in the game Obama got some criticism -- after the MSM was ridiculed into it by a SNL sketch -- but anyone who thinks that, objectively, Obama got it every bit as bad from the media as did Hillary is just a little short of intellectual honesty, I should think.
From the moment the Wright bombshell dropped (mid-March) and onwards there was near-constant criticism for Obama. And before that, there were questions of if he was black enough or too black. As if there was some correct amount of blackness he could achieve.
If Hillary did receive more criticism earlier (while also being called "inevitable") then it was because she's been around longer and the news had already decided on their script for her campaign just as they had decided to ignore Edwards.