The REAL reason ADC feels weak
Ok, I don't play ADC. I play two other lanes (not important which) and now also, as a consequence of autofill, support.
That's the real problem with the ADC role right there. ADCs aren't getting real supports. They're getting jungle mains. Shit, I can tell you the last 2 ranked autofills I got i played Galio. I'm sure the ADCs weren't pleased....especially when I walked away with most of the kills in the lane.
Thats right, you stick a jungler in bot lane as support, the ADCs are going to have a shit time. Not because we're not trying, but because that isn't the role we've played 1000's of games on. Two roles are completely different than all the rest. Support and jungle. You stick someone who plays top and mid at Jungle, they'll suck. Guaranteed. Similarly, you stick someone who plays jungle/top at support, they're going to suck.
But their sucking at support is going to have a drastically larger impact on the ADC than anyone else.
Before handing out a single buff to an ADC, Riot needs to temporarily remove autofill to see if things improve.