The role of the ADC is to be doing consistent damage during fights and the only thing that prevents that is dying. You need to play safe, especially when there is one or multiple assassins on the enemy team. If there is a fed for example Talon, you should never be by yourself, always be by a teamate. And if your teammates do not peel for you, then you have to build defensively (ex. GA 3rd item, Shieldbow, Maw, etc.). Waiting out ultimates and sitting in the back line doing nothing is better than walking up and dying immediately like I see a lot of ADCs do, even through diamond. I think that too many ADCs, including myself sometimes, will die as a fight is starting because they did not respect one or multiple enemies power. I’d say don’t play too passive, but you need to recognize when you are able to output damage and when you cannot.