Well, now, how do we get two such different explanations of FBI discontent with director Comey?

Ed Klein at the UK Daily Mail says it's because respect from rank-and-file agents - and Comey's own wife - went seriously south when he didn't recommend that the DoL indict Madame BleachBit:

The atmosphere at the FBI has been toxic ever since Jim announced last July that he wouldn't recommend an indictment against Hillary,' said the source, a close friend who has known Comey for nearly two decades, shares family outings with him, and accompanies him to Catholic mass every week.

'Some people, including department heads, stopped talking to Jim, and even ignored his greetings when they passed him in the hall,' said the source. 'They felt that he betrayed them and brought disgrace on the bureau by letting Hillary off with a slap on the wrist.'According to the source, Comey fretted over the problem for months and discussed it at great length with his wife, Patrice. He told his wife that he was depressed by the stack of resignation letters piling up on his desk from disaffected agents. The letters reminded him every day that morale in the FBI had hit rock bottom.

'He's been ignoring the resignation letters in the hope that he could find a way of remedying the situation,' said the source. 'When new emails that appeared to be related to Hillary's personal email server turned up in a computer used [her close aide] Huma Abedin and [Abedin's disgraced husband,] Anthony Weiner, Comey jumped at the excuse to reopen the investigation.'The people he trusts the most have been the angriest at him,' the source continued. 'And that includes his wife, Pat. She kept urging him to admit that he had been wrong when he refused to press charges against the former secretary of state.

Grant Stern at the Huffington Post, relying in large part on information gleaned from the tweets of Newsweek's Kurt Eichenwald,  seems to have this idea that folks at Comery's agency were upset that Comey's detailed outlining of the criminality of Madame BleachBit's behavior but not recommending indictment was the egregious element in the matter and what politicized the department.

LITD's estimation is that Stern has the flimsier case.

Especially given that Klein's account is corroborated by former US attorney Joseph diGenova:

DiGenova made it clear to Breitbart News that he believes that Comey has now painted himself into a corner, primarily by botching the first investigation so thoroughly and now by incurring the wrath of the Clinton campaign, with no clear pre-election exit strategy.

He has obviously succumbed to pressure, he folded like a cheap suit by sending a letter because of the manifestly improper decision that he made originally to not prosecute. He shouldn’t say anything further, in light of his statement. If they conclude the investigation in the next few days and he comes out publicly and says there’s nothing there, I don’t know what will happen inside the Bureau. The place is seething right now. Some of the more senior former FBI officials are absolutely livid.

You may have seen former FBI Assistant Director James Kallstrom’s comments, in which he was just extremely critical of Director Comey. I would hope that we don’t hear anymore from Comey, but at this point he appears to be under some mental stress and he may very well top it and say something additional about it, but then that will show the investigation he’s now conducting was just not through again. So it’s hard to say what he’s gonna do, I think the guy’s in some sort of downwards spiral.

This seems far more plausible and substantiated.