That's a constant in Pattaya, not just Riviera. Tiny but overpriced shoeboxes with awful ventilation. Case of Siam Oriental Tropical Garden for instance (Boasting beautiful glass with no windows, making it perfect glasshouses to die inside unless you run aircon). No wonder long time residents on those places live with their front door and little windows open.
Besides, electricity prices have doubled in a year, so keeping a room cool on aircon these days can result into a steep bill. Those kind of rooms are shiny and in tune to what the western tourist demand, but stay a month in there and you'll develop some form of claustrophobia. Not to mention how much you 'll sweat.
Oh well! Facilities are usually awesome, that's true. Especially when you do not cross savages peeing in the pool, playing their annoying bluetooth ghetto blasters or shouting on the phone as if they were alone hunting bears on some remote steppe beyond the Urals.
Give me a fancyless and old place, better adapted to the climate and quieter too. Needless to say cheaper.