Trouble is with every chess game someone wins and is elated, someone loses and becomes depressed.  We all need maturity to handle this frailty that humans have and computers don't.  So rejoice for being human :)

Even when I win I feel for the guy who lost, who probably fought a good fight.  And I have to acknowlege that (an awful admission) lady luck nearly always plays an important role in determining outcomes.  Sure we enhance our prospects by keeping to basic principles and watching for all the pins and traps. And all the while looking for deadly strategems.  But if we are honest we are thankful at the endgame when we find a happy combination occurs, which was not really foreseen, but we all take credit for.  So if you're going through a bad patch -- think of the pleasure you're giving others, while determining the bad patch is temporary -- part of your learning curve.  :)