Pretty expected. That said, I feel like killing people who drank the contaminated water might have been slightly counterproductive. Just letting them die by themselves would have demonstrated the problem pretty effectively without making villains of themselves. Cultist nutters or not it's a...
I don't think it's possible to drop the ball this hard while making literally any kind of effort, I can only assume that past a certain point the writer stopped giving a shit about anything that went into this.
Plot twist; the machine is lying about helping - it did take the girl's dying words literally and wants her to have friends, so Usa is fertilizer. And now more friends have arrived.