Response from Dieter:
well I did not meet Yamina in person, I was on vacation. So I can't tell something clear about her. I only feel extremely insulted by the comments she gave to my flat.
1st quote "The apartment is an interesting 70´s style, original I should say." Fact is that all furniture was new bought in 2008... the big wardrobe in the room she was staying in with husband and child was installed in 2013.
2nd quote "The only problem is the bathroom, it was really dirty, I could not shower for 3 days because I was disgusted." well it is a shared bathroom. To my opinion the other guests (a Brazilian couple who stays all December long) is not behaving too badly in the bathroom. So to my opinion Yamina is maybe very picky or she did not read the description carefully that she rents into a place with shared bathroom.
3rd quote "The double-bed was not comfortable at all" Ok its not clear to me what made the bed uncomfortable. Maybe the matrass was too hard or too soft...The duvet cover was bought just some weeks before new. Maybe she is used to other system of beds. Or she preferred 1 big bed cover.
All in all it sounds unfair to me to recieve such a review from a newbee at airbnb expecting to pay small money without accepting some limitations this way of sharing flats can bring with.