Excuse me sir but this is not accurate at all, I have come in to the apartment several times while guests where staying in and I guarantee that it was COLD right from the entrance when I walked in, when the air conditioning split machine is at the other end of the house, where the living room and main bedroom are, so the AC does indeed cool down the entire apartment, and A LOT. If you come from Sweden and you are used to super cold temperatures and not feel comfortable with hot weather, maybe Barcelona is not a place for you to visit during July.
Second, the bathrooms both have windows, which can be even seen from the pictures of the listing.
Third, anytime you travel to a touristic city, there is a tourist tax to be paid. You as a tourist, have the duty to get informed before traveling. And if airbnb does not include a feature to indicate the tourist tax without them increasing the price with their service fee is definetly not the hosts' fault.