The criticism in this review is excessive and needlessly bitter.
First, you didn't review the room you stayed in. A large chunk of this review is commenting on the living room, an entirely different room from the one in which you stayed. FYI- all guest are provided with a towel; there was no need to rummage through my personal space and cupboard to get one. I'm proud of the high standard of cleanliness and presentation I maintain in the room you stayed within as I am the standard of the living room.
Secondly, I informed you before you arrived that there'd be another person sharing the flat. I always inform every guest if the apartment is shared. I want that guests have privacy, but I like to be clear on the situation. However, I understand from your flat mate you ENTERED HIS SPACE / ROOM. I don't expect guests to invade another's personal space and be forced to accept your thermostat setting. I would hope that boundaries between guests be respected when you are informed you are sharing.
Finally, your fellow guest cleaned the stain he'd left on the toilet bowl, once he was aware. He also apologized for being inconsiderate. A text from you led me to believe you were actually satisfied with the toilet once and to demand him that he needs to clean it and that effort had been made. It does seem needless to leave such personal criticism of the other guest when he had attempted to rectify his oversight.
Your comments on my English appear unnecessary. I make every effort so guests enjoy Darmstadt and I do this by being open, friendly and to respond quickly. This is best way I attempted to diffuse the situation you had that was resolved.
People make mistakes and they learn from them, but I find your feedback veers sadly on the vindictive and is thus misleading.