Using end of game score to judge.
"Shut up your 0/4" Yes, because after you and the rest fed the unholy shit out of them before even 10 minutes in they could freely walk up and dive my sorry ass.
You could be going pretty well, keeping up in farm and not dying, but if the rest of the team is looking at a total score of 10-1 before the 10 minute mark... its not suprising that the enemy team can stroll on over and beat your ass past 2 towers. Yea, the only safe place at that point is sitting in the nexus.
Meanwhile you get shit talked for your score for daring to suggest to play like they are behind, (politely) while they continue to give roughly 3 kills per minute.
/end rant.