Ugh! I can't imagine the mess and misery.LOL. That's not being a hoarder. We had a home here last year that had over 200 cockatiels (and other animals) living in the attic with no heat, etc. That's a hoarder.
Worked on both sides of shelter/rescue. You REALLY don't know the person until you go to the house, and even then...
I only cleaned - adoptions just seemed like too much responsibility. Just couldn't hand over an animal, and not totally KNOW.
It's scary out there!