Even if a very damning story comes out about the FBI, what's anyone going to do about it? The FBI might scapegoat some underling at best, as they did recently with Agent Timothy Thibault. But even Thibault will probably pop back up in a new position or become a well-paid contractor.
And don't look to the DOJ. It's as political as the FBI.
DOJ/FBI = Sword and Shield of the Democrat Party.