Nesheryn Atienza

I don't understand why would they care or be obsessed with CSAT even that their lives are in danger during an alien invasion, they still think about the points for the CSAT. I don't understand the ending... it's so messed up, they all died not because of the sphere but that 1 classmate.. like what is the reason they fought in the sphere if they are going to die just because of their classmate. Then after everyone died all of a sudden "after 2 years" shown up and said that they eliminated spheres with the invention of some people in the authority. I don't get It it's giving THEY FIGHT FOR NOTHING, both ending in S1 and S2 are so random.