How many people sleep and live in a single military barrack these days?

This is a scene where Private First Class Park Min-seok is berating Private Moon Bit-na..
Isn't it about time for single-occupancy rooms?
I feel like it's time for them to use respectful language with each other and just be on terms where they greet one another..
Bullying each other, being bullied..
It's been nearly 30 years since I served in the military. It still hasn't changed... seriously..