AIR CONDITIONING IS NOT ENOUGH

I have a 2011 model envy digital air conditioned vehicle and I am not satisfied with its cooling. Throttle controlled etc etc but unfortunately its performance is not satisfactory. While driving on a 100 km straight road in Antalya, it blows 7 - 7.5 degrees, but in the same way, when the ramp goes down, I see it decreases the blowing temperature to 5 degrees. (I check with a digital thermometer instantly, how many degrees it blows

unfortunately, the air conditioner of the 308s is weak, my teacher, if you do not have film on your glasses, glass flim has an effect, so I found a solution.