Perhaps you have
narcissistic personality disorder or you were taught to become like
this due to your family upbringing. You can try to figure this out
through psychological counseling.
Given your negative family culture, where
parents shame their kids into obedience. It is likely you lack
acceptance, approval and positive encouragement in your growing up
years.
So by winning, you
think you're fullfilling those needs.
The question is, if you
are removed from your negative family environment will it make any
difference ?
If you are a person
lacking of self-esteem and self confidence, you will continue to be
competitive and selfish.
If your self-esteem is
derived from another person's failure, you will be constantly
battling to fill that need. Soon, you'll be this loner,
battling with your own demon.
Most people who live vicariously
are able to accept defeat graciously. Because losing that game to
another better player is not a big deal. The joy is in playing the
game, winning is secondary. The harder the opponent , the more
exhilarating the challenge, so defeat is acceptable and
expected.
Your own happiness is
within yourself.
Someone else's
happiness does not cost you yours.
Someone else's
misfortune does not make your life any better.