Why bot will always be decisive factor
- Disclaimer: this is a subjective opinion - TLDR read the second part only
People complain about ADC, and some are right, kits like twitch's should not exists, but that's another story. The thing is, bot lane will always be the decisive factor. Even back in the days when top was dominant, bot lane was the lane that decided the games in competitive. And it's logical, bot lane = 2 players, while any other lane is one player. Because few sup go out of their comfort zone and go damage, they will always be the bot duo.
The solution most ask: nerf ADCs, will make bot again the lane of mid laners, where casters like Ziggs will be the norm. That's why ADC were buffed in the first place, they went into a slum where even on bot people were starting to not pick them. As for sup changes, almost every game was: "fuck I'm sup, give me other lane or I go fed", almost nobody genuinely like the role and imho it was a very very boring role to play in soloq, ward monkeys. Now the "no sup or feed" is rare that I think most forgot the days where you dodged because you had a zed sup. Understandably since as sup, you had almost 0 impact on the game, and it was all decided by a single lane: Top. That sucked hard.
ADCs are not that strong. They have huge damage, but on their own, they die very fast. What makes them OP is the sup. Pick an ADC top and you'll see it's most of the time a bad choice. Not only that but even late game a fighter top will probably kill at 1v1 the ADC with the right build. What makes the whole thing stupid atm is the fact ADCs are very hard to reach due to sup. Most of them are either mobile or have a CC. On top of that they have a minion that shields them and also apply CC. This makes things very hard for a top lanner to dive into ADC like they used to.
Imho the solution should be the dismantling of bot duo. Support gold should be dependable on 2 things: warding and roaming. Make sup start roaming at level 3-4 and not stick so hard to ADCs. Make ADCs have a little less damage but not to die instantly like for example at a Lux E+R combo (yeah, that's how ridiculous is as an ADC, you don't even need to get hit by Q) so they will be more independent. This way the game will be more dynamic, warding will be mandatory since there are 2 roamers and you won't have hard stuck farming lanes like Nasus. Also playing as an ADC in soloq won't be a matter of luck in getting a decent sup and the sup won't have to stuck with a bad ADC