Not that vayne isn't bad right now but....
This little shit
is legit broken right now... at least with vayne you can beat her if you win early, but twitch has a solid 54% winrate at ALL points in the game. sure vayne can go off on your team, but at least you can see it coming and save your cc for her.
comes out of nowhere and nukes your entire team all at once with a collateral dmg highest auto attack range in the game(not including caits head-shot). as long as you're not the one getting assassinated by vayne you can land your cc on her and maybe kill her with the rest of your team. you sure as hell can't do that with twitch cause you're not getting anywhere near close enough to cc range before you take 3000+ dmg late game.
rant over [zombie-nunu-bummed]
. champs that can find him and all in as soon as they see him out of position. otherwise there is no counter play. you can't see him and the instant you do it's already too late cause he's got his ult on with the attack speed boost and he's already got you. either you try to run at him and die(maybe land cc for your team) or you try to run and die anyway.
(kinda applies to every ADC but still)
wall