What does complaining do to you? (Walking Through Illusion, Thompson)

     We all complain.  Usually, when we complain its about something we want changed and don't like about someone or a situation.  Sometimes, it's something that we do to others and when it's done to us we don't like it.  Some examples could be complaining about someone being late to a meeting or someone not driving quick enough in front of you.  The ironic part is that we all have been late to a meeting and driven slow for some reason.  In my eyes, complaining only causes negative feelings in any situation.  There are two ways to approach a situation you don't like; complain or actively try to fix the situation.  There are always two sides to the coin and you can make the best out of any situation.  Complaining only brings yourself and others around you down.
     Thompson, in Walking Through Illusion, explains it best in her dialogue with Jesus, about his work fishing with Andrew, from the Bible.  Jesus wasn't the best at it and Andrew complained about it.  Jesus knew the truth that he wasn't a skilled fisherman and didn't take it personally.  After Andrew complained, he would feel very badly and always apologized.  Complaining usually results in negative feelings and even guilt afterward.  So, what's the point of complaining?