Possibly: kissing the asses of all the magats, mega-doners, and the orange criminal, takes time.

ICE targeted him at the order of someone higher in authority -- by a short chain to the orange criminal.

The orange criminal never fails to be stunningly despicable.

Well, of course they are. That's what they do.

There is one reason it's taken so long to release the Epstein Files: it took this long for the orange criminal to scrub them, and reasonably hide the scrubbing tracks.