There's some more context to add.
An FBI agent can't just open a case. You have to get concurrence from from a Department of Justice attorney in order to do so. They're the legal check and balance when it comes to whether something meets a legal threshold for burdens of proof. Likewise, a DOJ attorney signs off on absolutely every piece of paper that gets placed in front of a judge or a panel. It's easy to point the finger at the FBI here, but it's failure is exactly 50% of the problem, no more, no less. I don't expect the former infantry officer-turned-agent to be the sterling reviewer for burdens of proof, but I do expect that of the lawyers. I think most people are now seeing that some agents were set up to fail by some very senior influence who were just never expected to get caught.
Likewise, the agents I know classify the FBI in three buckets - The FBI, the FBI in New York, and the FBI in DC. When you think the Law and Order FBI that most Americans (used to) think of, that is the FBI. When you think the aggressive, cowboy ops, -the-locals-and-take-over FBI, it's the FBI in New York. When you think sleazy & manipulative FBI, it's the FBI in DC. The three parts don't really play well together, for good reason. The NY folks piss everyone off but that's the nature of an aggressive organization. The DC folks piss everyone off because their hyper-political bullshit slams, derails, and scuttles lots of good work while replacing it with bullshit (such as this). The rest of the FBI doesn't piss anyone off, because they're doing their job just the way you want them to.
Did it surprise anyone that the FBI in DC ran Hurricane Crossfire like a shitshow? Nope. Because it's run by political appointees and politicians, deeply ingrained in the shit-scented cultural winds of the moment. If you ask me, as a separate organization, the DOJ is even worse, because you have politically appointed lawyers. It doesn't take much for a few (very) senior folks to lean into a chain of command and skew priorities and processes.
Want to redeem or fix the FBI? Only put experienced agents in charge - no more political appointees with no LE/intelligence background, no more lawyers. Baseline it to profession competency, highest moral standards, and absolutely ing decapitate the leadership who was or is in place when this all went down, to include prosecution where appropriate.
Treat it just like you want the AF to be treated - the core mission has been rotted away by leadership completely out of touch with the line force, programs and politically motivated bullshit that takes time, effort, and resources away from your actual mission, and a system where dipshits promote other dipshits because they look the most similar to how the senior dipshit looked back in the day. You want a CSAF/leadership that is mission centric, teflon to the politics, and willing to push back on anything that doesn't progress the defense of the nation? The FBI wants that too. I actually believe the FBI has a better chance of doing that than the AF does, given the lack of rigid rank structure.
Soap-container dismounted. I've got a number of connections with the Bureau and this has been a topic of discussion for a while.
Edited for spelling and to add:
Just like the AF, I don't think anyone (who shouldn't be removed) in the actual organization will look at you and say that the Bureau is faultless or innocent in this. There's a tumor. Remove it with vengeance. I am on team Hold Those At Fault Accountable, but I don't see burning down the whole FBI as the solution. Public hearings, prosecution, and removals - sunlight destroys corruption, show the whole world.