I honestly feel so useless when I play assassins no matter how fed I get. ADCs always decide the fucking game. How am I meant to kill someone that deals the damage of my entire burst 2.5x a second (obvious exaggeration is obvious but seriously they do so much) and has 4 people entirely dedicated to protecting them.
DuskDaUmbreon3 votesAn assassin is meant to roam and get others fed. Think a support, but no utility, and a fuckton of damage instead.
Your job isn't to carry, unless you go 36/2 and end at 28 minutes (funny story: I once did that with Diana. Holy fucking shit, I dominated that match). Your job is to be the one that cripples the enemy team in early game, and be such a high damage threat that they have to save their CC for you.
TimX24968B2 votesi thought they were supposed to kill priority targets by building full damage.
DuskDaUmbreon1 votesThey do that, true. But the nature of how they play means that they pretty much won't be effective in late-game, when they can't kill people in half a second or less, meaning that the enemy team actually has a chance to CC them.
Their job is to kill the priority targets before said targets get to their full power. They're not meant to shut down a fed ADC (unless they find him solo farming), look for a burst mage to do that. Their job is to stop the ADC from ever being fed in the first place. I think people got too used to the assassin meta, where assassins killed ADCs at any point of the game, solo or in a 5v5. When they were reworked to be a bit more delayed, people weren't used to that. And people are still stuck on the idea of assassins beating marksmen at every stage of the game, not realizing that that's just not how it's supposed to be. You can't build up power as an assassin, you have to get fed and dominate ASAP.
The Yetii Rider3 votesThe point of assassins is to roam in the early game, kill the ADC and top laner BEFORE they become a problem, and then when the team fighting starts go on the mage who can't stop you from killing them and has no one peeling for him.
"I can't kill the ADC"
Then don't. Kill the OTHER dedicated damage dealer on the team.
Hammermancer2 votesassassins are there to make bruisers feel good about killing something
Zëd Lęppelin1 votesWhy is this true?!
Hammermancer1 votesBecause you're so friggin mobile and annoying and I can't burst an adc anymore either unless i go full lethality on a bruiser and have no escape
Niaphim2 votesYou can kill other assassins and mages in lane. Then, after 20 minute mark, proceed to get raped by adcs.
Bronze Demon2 votesto have fun in the small window of level 6-9.
before that you can play dodge the skillshot+turret hugging after that you can play olympic marathon+work as a chef for the enemy team, by feeding them your nutritious self
Sona Ping2 votesThe point is to use all those tools that you have been given to influence the game and cause it to be a win for your team. If a player doesn't use his power spikes to his advantage and let's the other team's players reach their spikes and gain the advantage, they'll use it. And they will win the game because of that.
If an early or mid game champion doesn't secure a win condition when they are stronger, should they not be at a disadvantage in the late game to late game champions after they have already had the game stacked in their favor? It's only fair that they should. If you actually are getting fed and then losing due to getting outscaled, then it's a flaw in your play for not closing out the game when you had the ability to.. That doesn't mean that there is an issue with assassins.
LordGeovanni1 voteswhistles not building full tank 
any non assassin melee champion really
King of Demons1 votesLook at some high tier players and say that again. Learn from them.
Assassins are still very popular, Zed and Talon most prominently. And they win and decide many games.