I’m not a fan Danielle but him repeatedly denying he took the money and gaslighting her about it is a major red flag of narcissistic behaviour. They’re not compatible, don’t have the same goals and resent each other so they really should end the relationship.
I would not consider them hoarders, the appartement is just way too small for three adults and many pets. There’s not enough space for their personal belongings so it’s normal that’s it’s everywhere in the living areas. The mom is sleeping in the closet that would otherwise probably hide and store all that mess that we’re seeing in their living room.