S4 spoilers below

And S1 becomes a story about Rust trying to save anyone he can from an eternity of torment, since he believes that everyone has to repeat the same life over and over again, and he is in fact in a one man crusade against a cult who wants to send the most vulnerable in our society to a hellish eternal existence because they worship a 4th dimensional entity who created the universe, just so death could exist.

Literally rust versus the demiurge.

Others may have gotten this before, but I never considered a literal interpretation of it all before and it's fucking horrifying

Edit: it's also about the futility of that crusade and what saving them could even possibly mean. It's a really fucking dark show with this reading holy hell