I can't even play the game now

When I'm in draft the client will lag out so hard that the champion screen won't show up until there are 10 seconds left for me to ban. And when I do pick some one to ban it just says "there was an error locking in your champion" and the I get sent back to the lobby and hit with leaver buster... this has happened 6 times in a row. I give up on this client...