bad ending

I LIKED PART 1 MORE, why do they have to fight the purple balls if they get shot to death. they are oppose the ball purple to get back to normal life and take the CSAT...tried as hard as I could but was shot by a friend, it doesn't matter if it dies because of the purple ball but this dies because shot..very unreasonable and ridiculous.
If that's the case, it's better if they don't have to fight with that purple ball if it's useless
I HATE MEN IN SUNGLASSES WHO ARE VERY PERVERTS!! IT'S USELESS TO STUDY SMART IF YOU DON'T HAVE COMMON SENSE