I don't understand why people hate s2 so much. It's really good. The focus switches to Eun Yu and Yi Kyung and is meant to show what the world is like from a humans perspective and they are both still human. Hyun Su is only absent for 3 episodes in the middle but his presence is still felt. The viewer is looking for him just like Eun Yu is. Yi Kyung is such a badass character and is so fun to watch. Her scenes were all really good and so impactful. That actress is great. Eun Yu is so focused and determined I had a good time rooting for her.

Most of the green home residents don't make it but that's the point. Lots of people died at each new stage of the journey. I will say that none of the deaths were emotionally impactful because the writers didn't do a good enough job of making the characters sympathetic. I never shed a single tear in 3 seasons and there are other shows that make me cry several times in one episode. So for a show with so much death that explores the meaning of being human they really needed to dig deeper into the emotions. Other than that the story is compelling and a good watch.