Client bug

I am having countless issues with the client bugging causing me to lose games in my series in ranked. its really annoying and i wonder if anyone else has this much trouble. i know some people also are but its like 1/2 of my games don't even go through the champ select before it just crashes. It doesn't even go unresponsive it just goes away. Poof. its gone. i have reinstalled league and it didn't fix it.