In the past year, I’ve owned or rented three different fridges in three different countries. In each case, the fridge’s thermostat was set very low.
Here in Morocco, our little bar fridge has a knob which (rather oddly) goes from zero to seven. If we set it above two, the food freezes. My other recent fridges have behaved in similar fashion. If you increased the setting beyond, like, 25%, you had rock-hard bologna.
Do you find this as well? If so, why are fridges set this way? Is it because their freezing power gets exhausted over the lifetime of the appliance, and you need to keep turning it up higher to maintain the same temperature?