Question

we do not feel uneasy even under the enormous pressure of atmosphere

Answer 1

because the blood pressure inside our body equalizes the atmospheric pressure around us, thus we do not feel uneasy

Answer 2

Heya!
Here's your answer
See..

Atmospheric pressure is the pressure exerted due to the weight of the air. Column above us..
It is approximately equal to the weight of two elephants..

And it's value is 10 to the power of 5 Pascal..

But how does our body tolerate it?

Actually..
There is an equal and opposite force of blood pressure exerted by our body in return for the atmospheric pressure..

Hence..
We don't feel any pressure on ourselves

HOPE THIS HELPS U