Game constantly crashes!

The game randomly crashes. It just freezes, I can hear it overloading the sound (repeating the last second) and then it just closes the game! No bugsplat no message, no nothing. It sends me back to the reconnect screen and I have rush to reconnect cause most of the times it does it when for example a major teamfight is about to end! Like 6 out of 10 players have died and one of the teams is about to clean. It started happening this patch with the introduction of the halloween theme and it can happen multiple times in the same match. This reminds me League of Legends 8 years ago when things like this were happening every day! Not interested in reliving those moments.
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