lag in champ select scream and get punished by that

My League of Legend client lag at champion select all the time recently and I have to quit the game to get out of that, and I get punish my the lag almost every single time. I am not using wifi and my internet is very stable. I tried to report this to riot but never get any feedback from riot. Could anyone please let me know how I could fix this bug? the waiting is killing me now.[zombie-brand-facepalm]