Having a positive KDA doesn't tell me if it's not your fault that you lost. A player can go 20/0 but ends up throwing a game. Whether it's the players fault or the teammates', shit will always happen. That's a reason why I try not to surrender every game that doesn't go my way.
The fact you're sayin this, because u obvi think it wasnt since u ha a good kda, says it probs was...
Yes and no, your positive kda shows you played well to not feed but at the same time you didn't use that advantage to try to help your other lanes that were doing worse, but out of all on your team your blame is the smallest, if you should be blamed at all.