Under no circumstance should you win anything and gloat about it. Nor should you lose something and be a sore loser. If you aren't willing to accept what happens in a competition you should not enter it and if you win said competition you should be a good enough human to be proud of what you accomplished without being a scum. If you lose, accept the fact that you might need to try harder next time to accomplish what you had attempted to. Nothing more, nothing less.
Please.