BUG [crash] or [client]

My league sometimes crashes during the loading screen. During the loading screen I do not know how it happens but I crash and i can not go back in to the game at all or I keep trying to reconnect and i crash again. before any of that happens, in the loading screen no one is loading at all and everyone waits at the loading screen for a long period of time approximately 5-10 min. A thing pops up that my game crashed and that i had to close to client which then brings me to the reconnect screen and i repeat the process till i reconnect. I am always put into a low priority queue which i believe is no my fault for leaving or not being able to enter the game and support my fellow team mates. please help me and take me out of my low priority queue.