the real reasons adcs are having a hard time

is because tanking/front lining has become nearly impossible

you've outright nerfed or removed targeted cc to the point where everything is a travel skill shot, and you have to preload those to deal with all the mobility you've injected into the game.

right now tanks are just big balls of stats and initiation for burst follow up to win fights instantly. but its not something a carry couldn't do themselves, you've just enabled them to do their jobs.

peeling is nonexistent anymore.

if you want adc's to function they need to stay alive, you cant keep a 6 damage item squishy player alive if you just cant peel for them when they die to single abilities like syndra R or a rengar leap.

whats the point of having a 6 item sejuani in front of you when the she gets melted before you can find a favorable engage?

but wait, she'll just throw out her ult catch 5 and then she wont need to be tanky, because you'll kill them all before they unstun.

we need more displacements from our supports to physically remove/create positioning. terrain effects too.