Complaining is a part of human nature and it has become stronger one, because of our vivid expectations and then vivid life situations which mostly stands out at different sides,,
Both of them are living as closer in someone’s life , lesser are his/her complaints and more distant they goes , the complaints multiply.
No matter what, humans are always complaining sometimes lesser sometimes more. Because our desires , expectations and wishes too multiply with our sensory experiences of this world. So even if one has got what he wanted he must be complaining for things he doesn’t have which he now want to have.
I have been too going through this process, Still i complain,, but I think now i don’t complain much about materialistic things , i only feel disturbed when something or someone unavoidable takes away my peace of mind.