SCREEN FREEZES WHILE IN GAME !! pls fix this !!

YOOO ! this is not cool RIOT i was playing kled and a few minutes later the screen froze and i couldn't click anything so i pressed Alt+Tab and the screen went black all there was was the point cursor i pressed Alt+Ctrl+Delete and clicked task manager and it says LoL was not responding i restarted my PC and reconnected and a few seconds after reconnecting it froze AGAIN ! and i did the same i waited a bit this time but nothing happened so i did the same thing as before and it went black again so i disconnected and logged in and now i have to face a LOW PRIORITY QUEUE !! I DID NOTHING WRONG ! PLEASE !! RIOT I'M BEGGING THIS WAS SOME STUPID BUG THAT MIGHT GET ME BANNED I DON'T DESERVE THIS !