Here are some other options:
In my opinion, "Neat and tidy" is subjective. It means different things to different people. Big furniture in a small house can seem un-neat and untidy to someone, as can medical equipment, etc. In other words, there are a lot of things/reasons that can make a home seem untidy, without it actually being untidy. Therefore, it's an interpretation. And because it is subjective, you may want to check with your county's Housing Court Specialist to learn whether or not such comments are legal. But, it may be as simple as speaking with your landlord and explaining what his/her interpretation is doing to your chances to provide housing for your household.