What did I do wrong? - High Gold Game Baffling Loss
I am baffled by a recent loss I had in high gold/low plat elo. My team didn't troll or rage. Every lane won or went even. I started out 4-0 as Master Yi. Yet the end result was their ADC with a fully stacked sword of the occult and dancing on our nexus turrets after acing us.
I really want to get better. Right now I've hit a wall at the top of Gold 1 and have failed Plat promos several times. Some of them were due to trolls or ragers, but this game shows I was clearly outplayed despite snowballing myself and my team.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1660350093/213933916?tab=overview
Here is a link to the match history.
Teams: Jax, Yi, Annie, Vayne, Soraka vs. Fiora, Vi, Swain, Ezrael, Azir.
I was playing Yi in the jungle. Annie is bullying Swain. Vi picks up a very early FB on Annie mid, but is unable to snowball the lane further. Annie is still ahead in CS vs. Swain.
Vayne solo kills Ezrael.
I then gank bot along with Annie after Ez gets back and pick up a triple kill on Swain, Ezrael and Azir, along with dragon, and Annie killed Vi. We had zero losses except Jax losing 1v1 to Fiora top. I kill an overextended Swain again. I was thinking at this point - easy game. There is no way for them to come back now - Vayne is big, we have dragon, Jax can come back once I gank Fiora and there's no way for them to stop a 4-0 Master Yi. I was hoping that teamfight would completely crush their morale. The score was something like 10-2, they lost dragon, Vayne is fed, Yi is fed and Jax is keeping up.
Azir and Ez pushed our bot tower while I was healing, I don't know what Vayne was doing at that time, but she and Soraka weren't dead.
Then the downhill roll started.
We were not able to snowball even further and capitalize on our lead. Whenever we tried to push as a group, Azir and Swain would instantly clear the wave and Ezrael would then be able to freely poke us. Vayne couldn't get any shots in because she eats Ez/Azir poke and Swain zoned her out. We had no poke and were not strong enough to dive them, especially with Azir's displacement and Swain's snare. I tried splitpushing but Fiora was too strong and could 1v1 me.
We lost a fight at our mid outer tower.
Every fight afterwards played out in the same way. Azir and Swain would clear the wave. Ez would poke us while minions took the turret. We tried diving Ez several times and each time we were peeled by Azir's ult and by Vi. Vayne couldn't land any hits without eating poke. The only fights we won were when we had Annie flash, but they'd siege when Annie's flash was down, even when behind, and win simply due to poke. Even when they lost fights, Azir and Ezrael would keep getting away with their peel and mobility. If anyone tried to splitpush, Fiora could stop them. We died over and over again either running away from their poke (and getting chased down and killed) or forcing a fight and dying because we get peeled off Ez/Azir and killed by Azir/Swain's sustained damage or Fiora's burst.
I don't know what went wrong. A diamond player who started as 4-0 Yi would almost certainly not have lost. What made my decisions worse than the diamond player's?