Simone & Rasmus: In the very first episode, the two defied their mother and opened the bunker door insisting the possibility that the pounding on the door was made by their father, who just few minutes ago saved their lives by opening the bunker door and let them in before the deadly rain started. These two little brats led to the death of their mother from their stupidity. Both of them constantly risk the safety of the group for very selfish reasons. Rasmus, being trapped for 6 years in a bunker with his sister, falls in love with just about every girl he meets. And when they die or get hurt, he looses all reason to live. WTF!?
Martin: He had one job and one job only, shoot anyone attempting to enter the restricted area. Not only did he allow an infected woman and her infant through. He didn't even bother to radio his colleagues to give them a heads up that someone is coming their way. He is the sentry, that's the job. His whole platoon died and their death is on him.
Patrick: Actually, this formerly useless looser who couldn't hold a job is the most deserving to survive. But his group constantly disagrees with his very logical choices of actions in a post-apocalyptic world. He actually deserve to live. I am rooting for him.
Lea: Took her just a few hours to fully drank the Coolaid of a cannibal cult.
Jean: Betrays his whole group because his girl died.
Put this group of people in any other post-apocalyptic world they would have become instant zombie food. How they had survived 2 seasons is beyond belief.