A student who got 3.8 CGPA is unhappy because another student got 4 CGPA.
The student with 4 CGPA is unhappy because he/she is not placed in a Core Company.
Student placed in a Core Company is unhappy because his colleague has more salary than him/her.
The person having the highest salary in a company is unhappy because he/she has no time at all to enjoy their life with friends and family.
This is what happens when you get trapped in the infinite rat race. You are never happy. And you will never appreciate or be grateful for the life you have.
Come out of the Rat Race.