Let’s take one “very simple” case out of the whole mess of corruption within the FBI and DOJ and elsewhere.
The case being where Comey colluded with “others” in the FBI to assist Hillary in not being charged with a crime.
If that simple case were to have been brought to the regular court system, in a smaller jurisdiction, there is no doubt that Comey and Strzoc would have been found guilty of colluding to prevent a crime from being reported correctly and prosecuted correctly. And along with Comey and Strzoc, other FBI agents and Hillary and Obama and Lynch, would have been indicted as co-conspirators.
But, as we all know, people in high places are above the law.
Can anybody doubt that a crime was committed by Comey and Lynch and Strzoc in rewording “grossly negligent” to “extremely careless”, because they knew that doing so would allow Hillary to get away from investigation and prosecution, and most importantly, she would not have to drop out of her campaign for president?
It is clear his FBI did exactly as you said.