Heh I suck at adc and I don't envy the role. But when I do, I'm always going to do something off meta to compensate for my inadequacies and at least behave like a decent adc/secondary support.
Like.... I take Grasp of the Undying on Jinx, because she by default has the longest range in lane, and can perma stay in Grasp proc mode because of needing to minigun. Behaves similarly to Fleet footwork, and by the end of the game, I have 300 more HP than a normal adc would, and the damage on it per proc generally bullies lanes, even if it's smaller than a bruiser proc.
Also extremely good vs mage supports who are annoying like Brand, Xerath, or Vel koz because they lose the ability to bully your lane and in fact.... you begin bullying THEM.
And because I do that, I'm generally someone who doesn't mind if supports steal kills. My goal is not to feed, not to conquer as adc. If an adc doesn't feed but still contributes on par in damage, teams generally win. If a bad adc attempts to play an adc like a normal adc, they tend to feed, become useless.
And I don't mind playing utilitarian, because I generally play supports <3.