Leaver Buster is completely ridiculous.
I just had a ranked match during which my computer automatically restarted to do updates. I logged back in, and my team still won. At the game stats screen, I got hit with leaver buster for 5 games. I now have a 10 minute minimum queue time due to my computer restarting, even though I came back and my team won. That's complete bull. I don't even remember the last time I dropped out of a match before that.