I wish it mattered what I did.
But, since I play juggernauts, mages and tanks... I am entirely irrelevant unless I dedicate myself to protecting my ADC (or anyone else on my team who builds AD).
Riot just has this seeming hatred for anything that isn't AD and damage-oriented, and mages, juggernauts and tanks are worthless right now, with tanks only being situationally useful if you're actively CC locking their ADC.
I could be 15/0 and roam everywhere getting lanes snowballed, but it doesn't matter, because if my ADC isn't as good as theirs, then I automatically lose. If the enemy team picks a bunch of champs that abuse AD items and runes that mages / tanks can't get away with, then they automatically win unless my team is abusing even more broken champs / synergies -- even if we're massively ahead at first.
I just wish skill had anything to do with this game. But games are won based on champ select and what items you build. Anything else is just irrelevant.