I can connect with you, it is a typical Nigerian public schooling environment, i have been there, i felt same way as you have, I remember in my own case, about that number of student where gathered in an open pavilion, with a scotching sun, in addition to that their guys who clear their grasses, were on the field at the same time clearing the grasses with their engine sound as loud as possible.
it took a while but we had no option than to adapt to it, the first few days i will always return back to my room with headache and fever, but after our fist semester, we really did not even feel it, no one was actually bordered about it.
Don't give up so fast that is often how uneasy the start of something's are. I am a product of such experience but it has made me stronger.