You need someone to fill the gap created if you do.
They do provide some actual service to the American public when they are not attending woke homo, black, Latino woman’s, Asian, native Indian training and arresting or spying on non establishment political candidates and their grass root following.
Not trying to be funny, but they still do actually go after real criminals, spies and terrorists, in between all the faddy trendy politically motivated crap they do.
Most states have their own investigation units. In GA we have the GBI. The US Marshals can step up nationally. The FBI would have to be stripped down to the bottom and all new people hired. That’s the only way you could fix it.