Not that I agree with what he did… But why he did it in a way is genious. All those guys could have threatened his power and attempted to overtake what he had. He eliminated any threat and gained more resources at the same time.
I’d bet he fucks every girl in effort to start repopulating.
Idk wtf is up with heads in the fish tank. But as mentioned above the top he’s was the pilot they were “caring” for.