In life sometimes we have to make choices - these can be good and sometimes these can be bad.
Just like the choice of when we complain at a fancy Pancy restaurant because the delicious scrummy yummy tomato soup that you just ordered not only comes out cold and it seems your not the only one enjoying the meal, so is the fly doing back stroke. Don’t complain instead ask the waiter nicely for a new plate of soup.
On the other hand it's a good idea to complain when your next door neighbour is throwing a ridiculously loud party - pick up the phone and ring noise control immediately !
Sometimes complaining gets you absolutely nowhere when your little sister grabs your rugby tickets to the all blacks and tears them apart and chews them like an apple - no point in complaining the damage has already been done.
There are times when complaining is exactly the right thing to do. In the playground with your friends playing Rock Paper Scissors deciding who is in playing tag and it appears that it is you. You mourn and grizzle and yes you complain that Emily cheated - you know what I'm talking about don't you Emily.
Also when you are on your phone listening to YouTube and it comes up with you need to log in your wifi password and you put in the old password and you have no idea what is the new password you complain instead ask someone in the family for the password.
So to sum up complaining is all about choice - complain when you think it will work and don't complain when you think no one will listen because you'll be like that old fly in the soup in the wrong place at the wrong time.