@Aleksandr312
As @Anonymous explained, there is no standard airbnb set up. The whole concept started with the idea of renting out an airbed on your living room floor, hence the name 'Airbnb'. Today, an airbnb could be a castle or it could be a caravan. Some listings are luxury, some are budget. Some hosts provide welcome baskets full of fancy goods and some hosts don't even supply toilet paper. So, what you consider 'basics' based on your previous experience, others might not.
The thing is, if something is not promised on the listing, e.g. the host's belongings not being there, then I don't think it's a genuine complaint. I'm really surprised you got a refund based on the three things you mentioned above. I would not have high expectations at all if I booked this listing.
Sure, the host could be a bit clearer about the set up, e.g. specify that his belongings are there. I don't know if he changed it after his experience with you, but the listing does say that the apartment is lived in full time, so I wouldn't expect it to be empty of the host's belongings.
There used to be a section host's could fill in when creating a listing that specified whether the host's belongings were also shared there, but it seems to have disappeared from the settings, which is a shame, as that's quite useful information for guests.