I no longer try when going over 50%

I pretty much no longer try when i go over 50% win rate because when i found out how League of legends matchmaking worked that's when i decided not to try when going over 50% win rate why you might ask?, I am not here to flame or to be toxic but you will see my point.

There is something called forced win rate, The system tries to 50% your win rate, When you go over 50% win rate you are forced to be in the weaker team meaning you wil; mostly lose, not all the time but you get what i mean, When i found this out i no longer give my best when going over 50% win rate.

You will might say, You are "assisting the enemy team", No i am not, I'm still playing like normal but not trying my best