Durham could be the toughest, most thorough prosecutor ever, with a mountain of evidence, but he’ll never get convictions with the jury pool in the areas the trials would take place. Democrats have always been the party of “nullification”. Federal courts are located in large cities. Populations of large cities are mostly Democrats. Fair trial = not happening.
While true, he also didn’t charge anyone with the FBI itself. His cases against those he did bring charges against had the flaw that he was trying to prove that the lies mattered to the FBI when it was clear the FBI was going to do whatever it wanted and just used the lies as fig leafs for their misbehavior.