I haven't noticed any propaganda in this show. I have only seen the story investing in building its world. Dig up your time machine from under the layer of dust and jump back to the mid-late 19th century. Then imagine humanity of that era on the brink of a slow annihilation and the world of this show wouldn't be so far off the mark. Humans simply are power abusing, backstabbing scumbags, when given a chance. Try to give them the shining armor of a hero and you are on your way to a kids' fairy tale.