How bad is too bad? And who decides?
Is this game, where you went 2/9, did the second least damage on your team, died multiple times past river while only placing 11 wards in a 36 minute game (suggesting you either didn't buy any/very few control wards, confirmed by your build), had the lowest non-support/jg cs on both your or the enemy team, about 90 less than your lane partner... Need I go on?
There's too many statistics to reliably determine if someone's "bad enough" to get punished or remediation. I did the above to illustrate how hard it'd be to determine if someone is "bad" based on the statistics, or reports. It doesn't seem so good when you're the one getting looked at.. does it?
Point being, you can find games anyone's playing that look bad. Do you want to have to "remediate" just because I can pull out bad statistics/deaths in those games, or because people were mad at you and reported you?