The best ADCs are always a symptom of the meta
Right now the meta is protect the ADC, so ofc it's Trist, Twitch, Kog. Champions who can destroy the enemy team and all you need to do is keep them alive.
It's disappointing to see so many people crying about the ADCs and saying they're overpowered every single time no matter what the meta is. Just whichever ADCs are picked, people bitch about. It doesn't matter which ADC it is. You guys are impossible to please.
Why is the meta like it is?
- Because tanks can stoneplate + locket for like 2k shields late game.
- Because Knight's Vow lets you give the ADC 12% damage reduction.
- Because these items synergize well with tanks who are already good at peeling.
The meta is what it is because multiple factors come together to make a strategy dominant. The success of damage dealers like ADCs depend heavily on the meta.
If you get what you want and they nerf the current ADCs and also nerf defensive support items (which they already are) you can expect a big meta shift and other ADCs to start dominating. You will be just as outraged about the dominant ADCs in the next meta as well.
This community fixates way too hard on ADCs.
way too strong but I don't think it would change which champs are played as the bot lane carry. It would still favor champs with ranged attacks building AD as the farmer of the lane.

getting completely reverted. Play her while you can.
Doesn't interact with allies
Effect doesn't discriminate. Best on ADC's (as opposed to other squishies) because they have the game's highest damage out-put (more healing for the builder).
Shields everyone equally based on the user's bonus health.
The CC removal benefit everyone equally. Except maybe Olaf.
Doesn't get built.
Heals everyone equally.
Doesn't interact with allies.
"Allied basic attack burns" don't stack; the duration refreshes. So attacking more than once every 2 seconds accomplishes nothing. Meaning that Raw AD is the only important factor on that part; crit and AS don't help (if I interpret it correctly; Riot is a tad ambiguous on this one).
Like Zeke's, the healing doesn't stack; so high AS doesn't matter. This is the only item that does disproportionately favor ADC though, because the bonus AS benefits their raw AD and Crit. Except for Yasuo and Trynd, no one else really builds crit.
MS bonus doesn't discriminate.
Shield active benefit everyone equally.
Doesn't interact with allies.
(I'm probably missing something.)
CC doesn't interact with allies, heals/Shields benefit everyone equally.
(Can even us abilities on the front and back line simultaneously!)
(Q favors ranged champions for ease of application)
(E favors ranged champions for ease of application)
(Biased towards Xayah by design)
Passive favors ranged champions for ease of stacking. But allies don't directly benefit from anything in his kit.
Shield favors ADC's because it benefit their high AS and crit.
W AS bonus favors ADC's because it benefits their AD and crit. Interestingly, release Lulu also gave out bonus AP. But the AS and AP buffs were lost in the war against top lane Lulu. The AS came back as an effort to incentivize her to go back there.