Leaver Buster Not my Fault

So, I am waiting for the loading screen that shows everyone's splash art for their champs. My client crashes and a window appears saying that, "League of Legends can't open. Make sure your Direct X drivers are up to date. " I close this window then it goes to the screen where I can click the "Reconnect" icon. Then it goes back to the loading screen where it takes forever to get to 100%. It was stuck on 40% for awhile. So I get into my ARAM match and when done I get top the conclusion screen and it says I have been doing AFK behaviors and leaving. I am like "WTH?" Again, I am here asking riot please fix this. It is the second time this has happened.