It is good that he has he has a mentality that doesn't care about where he lives because the dormitory is far from being fancy. It is just a single room with a bunk bed.
The kitchen, toilet, and bathroom are communal. They belong to everyone on the floor of the barracks.
There are 10 rooms in total on each floor. If each room contains 2 people, that will mean 20 people share the kitchen, two toilets, and two bathrooms available on their floor.
This is a far cry from what he has ever experienced in his life. Even the worst experience he has ever had is better than this.
But just like he said, where he lives and how he lives don't matter. There are many more things that don't matter and other things he would like to prioritize.
For example, he would prefer not to need to eat, sleep, and excrete over living in a fancy place. These three things are more insulting to him than his living conditions.
