@Heidi664 I'm sorry you had this thief guest.
Yes, you really need to inform yourself about Airbnb policies, because iif you don't follow them exactly, they will deny you. There's nothing warm and fuzzy about this company, despite their rhetoric.
I was wondering why you have 2 duplicate listings on your profile. I'm assuming the one that has reviews and a 3* rating is because that jerk gave you a 1* rating. I would suggest that you start over, because you will never be able to get that rating up again for years.
A couple of suggestions. Your listing description and some of your other wording, like "I will not be contacting you during your stay" should be changed, IMO. The description just reads like a real estate ad and while you may just be trying to reassure guests that their privacy will be respected, between that and the listing wording, guests can get the idea that this is just a faceless rental that they can do anything they like in, with no oversight.
Try to make your ad more personal. Give guests the idea that it's someplace you care about, not just some investment property. Don't say you won't contact them- you should in fact contact them. Send a message after check-in, asking if they settled in okay, asking them to please contact you if they have any questions or issues. Send another message the afternoon before check-out, saying you trust they've had a nice stay and reminding them of check-out time and any check-out instructions. Guests tend to be more respectful when they know there is a human nearby paying attention.
If you use Instant Book, turn it off so guests have to send you a booking request so you have the opportunity to read any reviews they have, and communicate with them to determine uf they seem okay, or send up red flags. (The one review that bad guest had was from a property managed listing- you can discount those reviews- they leave non-informative nice reviews for everyone).