[CRASH] After lobby time ends and the loading screen appears my game will crash and not let me load

After joining a ranked lobby, my game will enter the loading screen and instantly crash. After reconnecting, the game will continuously crash and not fix itself even after repairing game files. I'd rather not get demoted because of a bug or in-game error. I have lost 2 games, one as a 'leave' and the other as a 'leaver' although it is not my fault that this is happening.