Freezing game after champ select

My game has frozen a couple of times when i try to start a game. I've lost lp cuz of this and i really need help to fix this problem. I just normaly select champ in ranked and then in loading screen everyone is on 0% and nothing happens. Ofc this happens when im on a winning streak and i get good teammates, which is really rare nowdays since this community is toxic af... But anyways, if u got any tips or ideas how to fix this i'd be really happy if u guys could help me out. 3d time i have leavebuster proirity and this is incredibly annoying. Ty!