Complex sentence: In his future, in fact, Thor, separated from his human self, Jake Olson, had lost his ability to understand humanity, becoming more and more oppressive and imposing his reign as the only just thing to do.
Split into simpler sentences: In his future, Thor, had separated from his human self, Jake Olson, and lost his ability to understand humanity. Because of this Thor, became more and more oppressive and imposing, believing his reign was the only just thing to do.