Just had a game where the support in my team kept running down mid and dying left and right and refusing to cooperate with team. My team was ahead but this support thought he could throw and still win. In the end we lost cause he kept feeding the enemy team and made the game a 4v5. That's my story. IF you'd like, show me your stories in the chat below to show riot that we hate trolls and they should implement something to make it more bannable.
Lumus Avatar1 votessounds like you had a bot. did he talk at all? What summoner's did he take?
Toxic Samurai1 votesIt's ranked. why would he be a bot.
Rock Rockburgh1 votesBecause people are dicks.
Bots in ranked aren't COMMON, but I definitely have heard of them at least once before.
FyshinaTux1 votesHow about my just getting into my Gold V to Gold IV promo series last night? Would that be a good story?
First game, jungle DC's under 2 minutes in, he asked what division everyone was, then DC'd. Once our Fizz (mid) hit level 6, he died for the second time (I think) and afk/DC'd/Ragequit.
First game loss.
Second game, I made a legitimate error in judgement early on in bot lane and fed a kill to the enemy vayne. Then the Caitlyn that I was support decided it would be a good idea to afk farm while Vayne and Brand were harassing her, and she fed 2 more kills to the vayne... Oh, and our jungler came down and fed some kills twice (all but 2 times of which I died as well trying to... well... support).
Vayne did what Vaynes do...
Lost series... -_-
S H A Y C 01 votesI think its funny how those are the only stories anybody ever tells...I'm willing to bet you have been carried just about as many times as you've been tanked. I've had several bad games where the team pulled out a win despite my non intentional feeding. I'm not discrediting you in anyway, im just trying to put perspective on the situation. Another point is, have you seen the updates to leaver buster? They are now punishing the crap out of you if you DC even a couple times no matter how many matches you have completed...so if your isp has trouble for a hot second you could be put in a low priority queue...how much more do you want them to raise the bar? Be careful what you wish for
Sooko1 votesIt only takes one to win :P 
Not saying these are OP, but they can effectively either roam, snowball retardedly well, carry, backdoor, make hooks and plays and chew down turrets.
Now onto your complaint. One experience with a troll does not mean that every game will share that fate. You need to keep aiming high and try your best to beat your previous performance in the game before. What is up to you to win the game, do it, what isn't, you can't change, nor does Riot. Trolls will always exist in the internet, especially since creating a new account is very very easy in LoL.