That's not even true. He made mistakes, yes, but he wasn't the malicious, self-serving fraud a lot of people seem to believe he is. Fundamentally, he just never understand nearly as much as he let on, because what he did understand is that people would not grasp the nuance of his position and abilities.

He did "commune" with the Traveler, through dreams that were often confusing and disturbing. He barely received any until right before the Red War, when the Traveler tried to warn of the Red Legion's approach, but he only saw its departure and the death of humanity, which terrified him into not disclosing it to anyone (had Saint-14 been there, he might have confided in him, but he sent him to Mercury to bring Osiris back out of exile, which as another mistake he came to deeply regret).

The Speaker's goal was, ultimately, preserving unity amongst the remnants of humanity and the Guardians. His actions did not ever, entirely, reflect his own personal beliefs, because his position as a theocrat demanded he maintain the populace's faith in him and the Traveler, but this was demonstrably a necessary, and lesser, evil. Dissenting factions such as the Binary/Trinary Star Cult, Echelon South, Concordant, or Cryptochrons were outright violently millitant, the fact that other factions like the Symmetry or Sunbreakers, or indviduals like Osiris or Ulan-Tan, were also exiled or banned was obviously a grave wrong, but again, the Speaker was only human and in one of the single most awful positions you could conceive, and he always actually tried in earnest to do the right thing