I'm sorry for your experience. That is absolutely unacceptable. Can you please name the cities you traveled to and the hotels? I've found that writing reviews on TripAdvisor and other travel apps are very helpful to deter future tourists from supporting these businesses. It leaves a permanent ugly mark that they can't even pay to have removed. I really have had a mixed experience on my visits to Greece. I loved Crete and Athens when I went. While Santorini is the most popular, its neighbor, Fira, was more laid back. I look forward to hearing about which cities you had these experiences in prior to my next trip.