Barr's pointing out the grossly obvious: there were at least 17 instances of the FBI withholding or tampering with evidence or information, in every case, evidence or information that with have damaged the FBI's request to surveil Trump Campaign people. These were not random or unintentional, they were intentional and proof of an anti-Trump plot. While exposing all this FBI misconduct, the IG refused to connect the many dots that pointed to that conclusion.
To borrow from and extend a comment from William the Indolent, 17 turtles don't get on top of fence posts, all facing Trump Tower in NYC, accidentally.