If I am honest, whenever you lose you seem to rage quit matches and then post on here how carp your team are and how annoyed you are getting with them. Yet when you win, its happy days and nothing can get you down off your high.
At the end of the day you cannot be good all the time, and has it ever occurred to you that maybe people have learnt to play against you since the leagues have formed and in addition by playing players above their level learned how to defend against people to ensure they get a result?
It seems to me that you play the same style every game, and usually it works, however, when you play someone with some tactical know how and they tweak their tactic and change their game style to counter what you do, rather than admit defeat gracefully and acknowledge you were beaten by the better player its rage quit and moan time.
I am not a great player and have lost more times than I care to remember, I even lost 5-4 to Hencore last season in a game I felt I should have won and nothing was going my way, yes I was fuming but I didn't come here and moan about it or rage quit, I accepted that the better player won and acknowledged it here.
These things happen. Personally I am getting fed up with the number of posts from people here who have beaten you mentioning quitting, and posts from you when you have lost blaming anything and everything that isnt gamerTM21.