A Clear Case of Incompetence : Poor Mindset = Distractions

     Something goes wrong for a person at work.  They let their mind get distracted, as they grumble on and on about what happened.  3 hours pass, in that fashion.  Thus, they mess up the next several tasks that they're doing, because they are distracted.  Their supervisor reprimands them.  
     (This is the critical part).  Instead of focusing on their tasks (and ceasing the grumbling), they begin complaining even MORE to themselves--or others--about the reprimand (AND the thing that initially went wrong).  They mess up the next few tasks due to careless mistakes.  The impatient and upset supervisor tells them to "get their head clear" and focus.  
     Instead of focusing, they let their mind continue to grumble (e.g.: "He thinks I'm not focused", "He hollered at me", "He never hollers at the other people", "I thought I was doing a good job", "It's so unfair").  The person doesn't seem competent enough to realize that they need to LET GO of those small thoughts and focus on their tasks (which will make everything better).  The person doesn't realize that their own bad habit of "letting their mind run on like a broken record"--continually complaining to themselves--is causing their increased trouble.  
     They don't seem to have mastered control of their own thinking… or a sense of prioritization.