If you've listened to their podcasts, you'd know that what they say when they say this whole your in control of your deaths thing in normal circumstances. They further say that in extenuating circumstances such as lag, rather than get mad at the other player or yourself, just think about how to avoid dealing with lagswitch McGee. In my cases, I see a lagger, and if they won't die from long range, I just dip back into my team. Now in a 3v3 playlist, this may not be possible but it's still best not to get mad. Getting on tilt can negatively affect gameplay and and up with an L instead of a W. To put it in simple terms; a laggy player killing you is technically their fault, but instead of placing guilt reform your strategy.