My theoryis that the mainstream media don't want to report on the story because they don't want to hurt Hillary's chances of winning. They consider Trump losing the election to be way more important than any journalistic integrity they might have retained (which, admittedly, was barely detectable even before the campaign).
There's actually been a lot of interesting stuff that has come out in the last few weeks, from Wikileaks, Judicial Watch, and the Congressional investigation of the FBI investigation. Almost none of it has shown up in mainstream news sources.
Instead we have wall-to-wall coverage of the fact that Trump is the sleazy womanizer that everybody knew he was already, conveniently peaking one month before the election when all of this stuff had been out in the open for years. Just as an aside, I remember several raunchy conversations between Howard Stern and Donald Trump that I heard with my own ears (having listened to quite a bit of Stern during my one hour long morning drive to work for 8 straight years).
Anyhoo, I've seen rumblings from various "FBI-connected" people in the right-wing blogosphere for some time about deep disenchantment within the FBI due to Comey's kneecapping of the investigation. I would have been shocked if there weren't frankly. Having spent a little time working in a classified environment, I know how seriously most people in those places take national security. Hillary's (and her cronies') success in skating away from this mess must really stick in those people's craws, regardless of their political leanings.