Hello Antonia I agree with you 100 %. I have experienced the same. Getting 3 and 4 stars both in public evaluation and in the private. At the same time I had a lot of expressions from guests telling me they were very satisfied, our place was excellent, just what they wanted, they would surely come back etc.
We just had a guest, that rated us public with 4 stars and private we got one 3 star and one 4 star. But the guest did not leave any comments at all!!!
I contacted airbnb and they investigated the case. the answer from the guest was: He had expected high-end facilities (350 dkr for 1 night stay for 2 person).
I think the rating should not take place withour proper comments when it is negative. I think it should not be allowed and also that airbnb should make better instructions how to edit the rating, perhaps also make some quality check in cooperation with some hosts
I dont know how the rating questionaire is built up. I would like to have more answers
Kind regards from Freddy (not a superhost yet:-) )