What is considered 'doing well' as an adc on aram?
I'm coming here salty to share my annoyance, move along if that doesn't interest you...
I play an odd sivir build on ARAM because y'know it's ARAM (and at this point it's tried and true enough I trust it well)
Goes Tear (cheap mana I don't have to wait on) then Death's Dance -> Cleaver (Max CDR+Sustain on Skill+Massive AoE armor shred) and then follow that up with whatever usually picking up the muramana whenever it's convenient.
Entire game I get bitched at by 3 champs, (2 on my team and 1 on the enemies) about how I'm not doing anything, near the end I vent a little and say something along the lines of "Jesus F*, Jax calm down I'm doing well" About 10 mins later the game is near end after those folks have finished telling me I'm not doing well, and 'an adc with no crit, or can't kill leona ever' bla-bla yatata whatever y'know.
So the question I had at end was : "What do you define doing well? Getting the most kills? Dying the least? Doing the most Champ and total damage? KIlling the most turrets? Because I did all of those things and I got cleaver so you (team had 2 more adc's) could do more damage. So wth do I have to do?"
To which the response was "Your build is awful" -left the room
and then usually go like this

for magic resist
for armor
also varying depending on what I might need/want
has decent synergy with sivir's bounding atk, think it was W or E, i get the two mixed up. plus more atk speed and AD.
adds tankiness and crowd control usually saved for if enemy team consists mainly of one damage type and already had sufficient defense for it.