I started playing adc for the first time basically since I started playing like about 2 years ago. Mostly just vayne and cait if she is banned and I can't get the hang of it. Of course until I get 3 items or so then actually become useful.
And of course the struggles of troll supports and such, another reason I hate adcing....
ADC is supposed to be a teamfight role. They typically have ok lane phases, decent mid games, and then amazing late games. Vayne is also one of the hardest ADCs to play, but she is legit busted right now. What's your build order on her, might I ask? You typically want to aim for a BF Sword first back, then get your Zeal item (Statikk Shiv, RFC, Phantom Dancer, or Runaan's, in the case of Vayne it'll be either Statikk or RFC you go for first), then finish the BF Sword into IE, then typically you would get another Zeal item (on Vayne, typically Phantom Dancer). Finish it off with a lifesteal item and then some armor pen.
Yes. You need to know how to position yourself. That's the first thing that comes to my mind when you say ADc. But with Vayne, you don't even have to position yourself right. So, right now, not really, it's an easy role. But depends on individual if they like the role or not and if they think it's hard or not.
The only problem with playing adc is that you are weak during the laning phase and there's alot of chance that botlane will turn into a shitshow 9/10 games.
Thats the narrative the adc mains are trying to push. Basically all you have to do is rightclicking and staying alive. Its hard in lower elo where no one helps you.
