Game BROKEN, literally unplayable

So, after posting this 3x without any solutions, here I am again. My game keeps suddenly freezing. When this happens, I can't close it so I have to reboot, which makes me lose A LOT OF EXPERIENCE EVERY GAME. Most of the times, it works again after that, but sometimes it doesn't.. Riot, seriously, help me fix this. I have deleted the game and reinstalled, i tried everything but nothing works... I'm running it on a GTX1060, so I can't say that my computer has trouble loading the game... I've put over 300€ in this game, some support would be welcome, because i've lost a lot of games because of this.
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