So I guess nobody here has lived in a squat then?? It's clearly not, but it's a similar envorinment.
Looks like a miserable mix of depression and some kind of hoarding issue. Probably severe obesity judging by the type of garbage.
I feel sincerely sorry for any human who could let themselves sink to this level. They must be a in an incredibly poor state of physical and mental health.
If there is a food source the cats are probably still alive and hiding, or have run away. I hope.
You guys ever seen "how clean is your house"?
To begin cleaning something like this you shove EVERYTHING into a corner with a shovel and crunch through it with gloves black sacks and a dust/pop mask.