To the people who say that trolls aren't as bad as people make them out to be in bronze/silver (probably low gold too), it's probably just a direct correlation to you not playing enough games to see them. Much like how you can go on a 10+ game win streak, you can play 10-15 games without trolls. Then you can turn around and get trolled 5 games straight.
I'm up to about 350 ranked games so far this season now and i've had my fair share of trolls. It took me three promotional series to get from silver 4 to silver 3. In both of my first two series I went 1/1 (no real troll games) and then the third game of the series was troll city. First series third game I had 3, that's right, 3 trolls on my team. In the third game of my second series I only had one troll (picked morgana mid, fed ahri 10 deaths in 15 minutes then afk'd the rest of the game... her entire reason for feeding and then afk was because we didn't ban Bard in champ select (which she cried about because she was on their team before a dodge and they "had a plan" thus bard HAD to be banned

. In my third series I got a duo for both games (won it 2-0) who went sion top and jinx adc (I played sona support in the first game as last pick and took her 2nd pick in the 2nd game because the Jinx and me clicked so well and the sion was good top).
Just had a game yesterday where I had a Pantheon Gangplank duo botlane who combined for 1-12 in the first 10 minutes (and of course blamed me for everything as the jungler). Who would've thought pantheon gangplank wasn't a viable bot-lane combo, especially against ashe + lux with an enemy xin zhao jungle!? Had another game a couple days ago where our Malphite jungle gave up (literally stopped participating in any fights or trying to push) at the 11 minute mark when it was like 7-15 on the kills. He just afk farmed in the jungle and ran to the base any time an enemy was within 3k range of him. Had another game in the past week where our Blitzcrank spent 20 of the 34 minutes sitting in the fountain, running out and ulting a wave of creeps, then running back to the fountain until his ult was back up...
I guess maybe we could also just have different definitions of what constitutes a troll on your team but things like this definitely fall into my troll category. I'm sticking with my previous theory though that some of you probably just don't put in the time to get slapped around as much by the troll RNG.