Means absolutely nothing. What else could he say? He cannot slam the organization he runs and expect anything good to come of it. Correct and proper conduct and information put forth would then be seized upon by the enemy as worthless and compromised. It was strictly a political statement, nothing else.
Well it was political in that it helped the Dems and hurt the man who trusted him enough to put him in the job. It seems he will fit right in over there.
Obviously I was wrong in thinking the majority of the FBI are not corrupt, he is showing us none of them can be trusted.