LOL Client bug (game freezes while in matches and Q

Recently I've had some issue with my league of legend client. In short, my screen freezes in the middle of my ranked matches or in the ranked Q forcing my account to dodge matches of afk on it's own. this problem has caused my matches and also pulled my rank down. since u lose a rank for every time u dodge i have lost so much am on the road to bronze V again. riot pls help. Another thing i want to suggest for riot is to stop starting a maintenance at random there should be a fixed time for maintenance or updates because every time their is an update i get disconnected in the process from my match and serve and unfair leaver buster am tired of it pls. there are some other games i know that announce a certain time and date for every single update and maintenance, this is esports for ekko's sake (my current main). Update announcements will helps players prevent leaver buster because we can log out prior to the time of update, thus reducing chances for error. Do not ignore this pls look into it thank you.