If you aren't dpsing as adc, you are basically useless.
tl:dr ADC did dmg and killed after=good ADC did no dmg and survived=bad
It doesn't matter how much farm.you got, doesn't matter how you never died in lane, doesn't matter how strong your item.spike is, if you aren't dpsing on the enemy during a teamfight you are comoletely useless to the team and contributes nothing dor example: That 0/6 malphite who is able to land 3man ultimate isn't the cause of the fight loss, the adc who is suoer scared and refuse to dps is the reason a teamfight is loss.
so adcs out there, srop being a p***y and actually do some dps.
Edit: salty adc mains stop brainlessly downvoting leave a comment if you want to argue.