Looking critically at the manners or ways individuals behave, shows that the inherent attributes really play a greater role which may affect the outcome of one's success story in life, and it can either make or mar the person's future.
In the same vein, Individuals is characterized by different kind of idiosyncrasies and as such, they tend to behave distinctively. There are some individuals that show penchant for complaining about anything if the odds does not favour them. They tend to be vulnerable and always at disadvantage because they do not want to be in control of something.
Complaining makes a person weak and susceptible, it does not put you on an edge. That feeling of confidence starts diminishing and over time you become weak at making decisions that can affect your life positively. We always want to dominate and be in control of everything, humans are like that naturally.
In essence, putting away the habit of complaining may put you at an advantage and make you be in control of something. It can as well trigger the sense of self will and boast your confidence.