You came and asked why lots of people dislikes ADCs. I told you one of many reasons and you decided to argue.
I don't really care tbh. ADCs are obnoxious. Their egos are annoying. They are demanding and dare you KS them. You can leave the game, because those people will do everything to punish you for the ks.
Riot blatantly favouriozes them. You know what happend when we had tank update? Nerf tanks and tank items. Assassin update? Items got stronger (cause adc can use 'em too) but assassins were pretty much wrecked. YES. I know what you'll say "but now they are strong and stuff". That's Riot and their crappy balance for you. Then we had MAGE update. You know what happend? Items nerfed or reworked for supports. Mages nerfed or reworked for supports. And finally ADC update (which was the very first major update). Better items, far overbuffed ADCs, as if whoever made those changes didn't know the words "nerf" and "enough".
You know what happend when Riot implemented Liandry? Every champion the item could be used, like teemo, was nerfed by exactly as much damage as liandry added. Now they are forced to use it.
You know what happend when AD items went from overall 60-70 per item to 80+? Nothing. No nerfs.
The last nerf ADCs, as a group, received the crit nerf.. Well, not even month after and there we have compensation buffs spilling out of Riots arse.
You know what veigar received as compensation buff with his rework? A nerf.
When Vayne was far overbearing and she could have 100-0 you within 2 hits, you know what happend? -3AD at level 18.
You know what happend when Karthus got just tiny tad above the average? -20% on ultimate. Not that you have plethora of ITEMS to build to defend yourself. Nah. ADCs don't build against someone. They go full glass cannon and if they die just tad too often, you know who's to blame? Support OR the champion that killed the ADC.
Sure you can find few champions from every group that is Riots fav and no matter what stays relevant (ahri, lee, yasuo, all ADCs, maybe kha?) but Riot gives half an ounce of crap when it comes to nerf whatever can kill ADCs. They just go at it, as if their family was on the line.
I dislike ADCs and I will dislike them for as long as Riots attitude won't change. That is... Never.
Edit: also forgot to mention, how ADCs steal items from other groups. I know this happens in every class with some success or another, but here Riot went ahead and actually made sure that "this item right here is for ADCs from now on". Runaan was one of few examples. It used to be good item for any ranged champion that used AA. Now? Either you are ADC or some stats like crit will waste.