First and foremost thank you very much for the feedback. :-)
In regards to the heat, I can't say that you are not right...Valencia can get quite warm in the summer, but I do offer 2 types of rooms: with a/c (at XX price) and without a/c (at X (Website hidden by Airbnb) when making a booking one has the choice to pay X or XX, obviously I know that it's all down to budget sometimes and, like you mentioned, I even provide a very powerful fan for the X price, which from what I hear is not a so common thing with other similar-Airbnbs.
In regards to the noises coming from the road, like having said so many times already, unfortunately there isn't much I can do about it...I am located on a third floor facing a busy central intersection and let's just say that here in Spain motorists can be quite "nervous" at times, so if one expect to open the windows at midday and hear bird's chirping...well I am afraid that's just not possible in the centre of Valencia.
Although I have to say that all these aspects are clearly mentioned in my listings, which I believe every guest should read before committing to a reservation, in order to know exactly what is that is getting...just like it is mentioned that the kitchen is not to be used for cooking, actually is not even listed as an amenities, but I still allow to make breakfast or simple/fast things...just like you did everyday. :-)