i used to think like this too, as a kid i thought evry game i watched on tv we lost, if i missed them i would see later on the news that the mighty sharks had got up.
it is not you.
there are many psycologically damaged young men running around who feel the same way due to the inconsistant performance's of our beloved sharkies.
try this...
lay down on a couch and tell yourself over and over.... its not me, its not me, its not my fault!
the pain gets easier as u grow older , then you begin to laugh hysterically at the end of the games and develop a nervous twitch for days afterwards, followed by nightsweats and waking up screaming "WHYYYYYYYYYY!"
such is the torment of being a long suffering sharks supporter.:drunk