Why does an employee is never happy and feels suffocated :(( ?

because capitalism is fundamentally unfair and takes advantage of him?
https://link.medium.com/95q3Ncg0ET

Depends on the job/environment I guess, I love my job and team :)

@heyheni capitalism doesn't limit you, other systems will keep you above a minimal level (only in theory though, look at how most non-capitalist places turned out) but can be severely limiting for many things. So eh. Pros and cons.