Tolkien left it to the reader to interpret the prophecy for themselves and had it play out in a surprising way. The show, on the other hand, had Gandalf land in a crater that looked like the Eye of Sauron when seen in an overhead shot that was repeatedly emphasized in the recaps and had sinister sounding whispering echoing voices in the soundtrack every time Gandalf performed magic, breaking Largo's ankle to his own advantage at one point, reminiscent of Sauron's whisperings that could be heard at many points in Jackson's LotR and Hobbit movies. The possible existence of a prophecy as stated by an unreliable Waldreg and acted upon by clearly powerful wraithlike beings who should have known what they were doing was just corroboration of what the show was already telling the viewer was true in the fiction. When it was revealed in the final episode that Sauron was Halbrand and not the Stranger, it felt like I'd been lied to. That actually made the show less enjoyable for me.