Getting LEAVERBUSTER'S too many times !!!

I played in this game it's been a long time since S6 , and this is my first time that i have this problem , my screen block or ( Freez ) in the middle of a game and i can't do anything , i can not even to reconnect , so i need to restart my pc then login in and reconnect , after that i get a leaver buster 20min for 5 games , this is a bullshit . i got 10 leaverbusters just in this month , even i've tryed to do hextech repair tool and also initiate full repaire but still got the same problem , _PLEASE FIX THIS SHIT or i need just to leave this %%%%ing game_ .
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