LIEden set himself up for a blatant equal protection double-standard - HilLIARy's massive violation of classified documents, no consequences; Trump retaining a few hundred (or score?) classified documents in a secured location, unannounced FBI raid. The kicker came when it was discovered that he had hundreds or thousands of classified documents from when he was Senator and VP - i.e. had retained for many years - in multiple unsecured locations.
The Hur investigation was supposed to consume time (to get LIEden's violations out of the skewspapers and TV skews shows) and then whitewash LIEden Hillary-style. Hur got a little too honest but had nothing been done the scandal LIEden's retention of classified documents would have grown. Garland tried to neutralize that blatant scandal, but his brilliant plan went sideways.
DU-folk, of course, think Garland should have brazened through what they believe to have been trivial, but Garland (and LIEden) knew that the discoveries in LIEden's homes/garage and university libraries could seriously damage LIEden's Presidency and the lawfare case against Trump. IMO, the scale of LIEden's mishandling probably dooms the Trump case anyway, but Hur's report was a serious blow to the case by reminding the public of what LIEden did and the scale thereof.