Believe me, that's nowhere near as bad as it can get. At least it's relatively clean. We have a TV program over here called A Life Of Grime - all about the work of rat catchers, bin men, sanitary inspectors etc - which regularly shows homes which are in a much worse state than that. You see people who hoard absolutely everything, never clean anything, and leave rotting food around (and much, much worse) until the rats, maggots and flies move in. The worst are the ones where the owner has pets, because they often can't stop at just one cat or one dog, but keep ten or twenty of them - and don't house-train a single one. The stench must be foul.
Really, it's very sad. These are people who are vulnerable and confused. They've lost their way and are trying to make up for it by keeping things.
But my hat goes off to those who have to clean up after these people. I really don't know how they do it!
Yvonne
