are discovering the true depth of the rot that's infected the entire executive branch and all the agencies. Many agencies were so gutted and depopulated that they can barely function; others, like the DoJ, are gradually being revealed as infested throughout with Trump loyalists who have been steadily undermining the agency's purpose of nonpartisan furtherance of the rule of law. Garland, an institutionalist to the bone, almost certainly did not realize at first how bad it was, and figured he could just keep on keeping on like the pre-Trump/Barr agency had done, at least most of the time since the Nixon era. The latest revelations about how it was spying on journalists and members of Congress, their staffs and their families, had to have been a wakeup call. Cleaning up that agency and many of the others will be a Herculean task, specifically, cleaning the Augean stables.
It would be sort of like if you bought an old house that was once owned by your grandmother but was sold to a stranger and had fallen into disrepair. But you really want to live there, and figure you can fix it up pretty fast and it will be nice again like you remembered it. You move in and find that there are carpenter ants and cockroaches, so you call an exterminator to get rid of them. But after that's done, you learn that the previous owner had operated a meth lab in the basement, so it's full of toxic chemical residues, and worse yet, termites have been gnawing at the joists and the foundation is sagging dangerously, and there's black mold in the walls. Looks like you're going to have to strip out all the drywall and completely restore the foundation. It will be costly and take a long time.
We are discovering the equivalent of toxic chemicals, termites, and black mold in the structure of our government. There will be no quick fix.