No one advocates anarchy on this website, but the history of the Fumbling Bumbling Investigators reveals a flawed and out of control organisation with little or no oversight.
1. Ruby Ridge, a grevious wrong. They went after this guy, a white supremacist, for a weapons violation. Not that I believe in white supremacy, it's kooky, but the FBI wound up shooting and killing his son and his wife. No one was punished, not even admonished.
2. Waco. This is too fat a target. The execution of the plan was a debacle. It has been proved that David Koresh could have been picked up outside his compound on numerous occasions before the siege. The bottom line, a lot of innocent folks died. In any case, the designers of the plan should have been fired for incompetence. No admonishments in this one, either.
3. Richard Jewel and the Olympic bombings. RJ saved lives. He was the initial discoverer of the bomb and got people away from it. Later he was pointed out as the bomber himself. This was not true. Now they say Eric Robert Rudolph did it. Where is Rudolph, anyway?
4. Oklahoma City. I do believe it was done by Timothy McViegh, but in the end the FBI "forgot" about two huge boxes of files they failed to give his defense attorney. This could have been used by McViegh to hold off his execution, perhaps forever. As far as I know, no admonishments for anyone involved at the FBI.
Throughout my military career, I have seen a number of low, middle, and high-ranking individuals sacked for incompetence and failure. The good of the country is at stake, and no one's career can and should come first. My impression of the FBI is that careers are job one, and crime prevention job two. The FBI needs to get its house in order.
We surely need an FBI, CIA, NSA, etc, etc. It's a tough world out there. But my fear is as long as incompetency is allowed or buried in these agency's then their missions are at risk of failure.