I would love to see this correlated by Elo. I started at 1271 the first day of preseason, carried that game, then shifted to maining support and was quickly into the 14xx range 9I play Morg when I can and pretty just fill in team comp with whatever we need). I've literally had one absolute feeder and no AFKs (a couple of DCs that came back) in 60+ ranked games. Every time I play normal ... it's a massive crapshoot as to what I get and if we even have a chance to win (hell, I troll normal games).
The stats that teams with Junger (w/ smite) + Support (w/ CV) win >>>> 50% of games is logical. Kill lanes are fun, but rarely work out against intelligent opponents. Maximize that gold for 4 people, secure buffs/dragons and have one person who is still useful as a ward bitch (everyone else should still buy wards) works for the pros and appears to work for everyone else too.
I started with at 1200. First game I went in had a troll and same with the next 4. I dropped to 1100 quickly. Won a couple more than got stuck with more trolls. Dropped to 1000 even quicker. I chalked it up to everyone wanting to play rank right as the season reset which allowed the really bad trolls back in to join with the halfway decent players. I was at once point sitting at 15 losses and 3 wins in ranked. I managed to finally claw my way back up to even when I reached 24 losses and 24 wins. Then lately I've ran into a string of trolls again once I reached 1200 during rank.
What bugs me is that I typically jungle, play tank, or support. I try to fill in the roles needed. I prefer that. It doesn't help when you get pure trolls. Here are the problems I typically encounter when playing a given role.
1) As a jungler: I know the game is headed fast into the losing column when the following happens. I get counter jungled hard with no support from the nearest lane. It's one thing to be at mini golems or red buff and have the other jungler come try to duel you or steal some jungle. It's another when you are dueling and every single person on the other team manages to leave their lane to help their jungler in your jungle while your team sits on their ass and then blames you. I'm sorry but if the bottom lane can come all the way to top and still make it back without any significant tower damage (at low levels there isn't going to be) then your team should be doing the same.
The other problem I run into is lanes that fail hard. They die 3+ deaths before 10 minutes without trading those deaths. Which means they are feeding from being over extended or tower diving too early. Then they blame the jungler for not ganking their lane as to why they have those deaths. A jungler can't be everywhere and when multiple lanes are failing it is not the junglers fault. In fact, it is NEVER the junglers fault for your deaths in lane. I only blame a jungler if they never make a gank attempt or fail miserably on their ganks and die. Or are so slow than they are still level 6 when other players are all pushing 8 to 10. Then they become worthless from being so far behind for just being slow.
2) As a tank. I know the game is headed to a loss when your team never follows through your initiation. Especially when you have the other team out of position, low life, and with an easy kill with no chance of dying for your team members if all nearby ones join in.
The other problem is people get anxious right before a team fight and initiate without the tank or go in too early to get blasted away. This really hurts if they are your teams main dps. Be patient, wait on the tank, and follow in when the tank goes in. Pick your targets wisely. The tank's target may not be the target the team needs to focus on. Typically most tanks have some sort of disable, that is best used on another major disabler before they can get their disable off first. Thus the tanks target may not be the primary target. The tank may go after the other tank first just so that the other team's squishies now have no protection and are easier to kill. The problem is when the rest of your team is too stupid to realize this and goes automatically for the wrong target.
3) As a support. All the above times 10. A good support can make a mediocre team GREAT. But it can't improve upon shit. I consider a support character like a multiplier character. However, you can't multiple by zero, if that is what the rest of your team is, and expect to be any better. If your tanks don't get tank items, if your dps doesn't get dps items, and if they are horrible at positioning and judging the best time to either strike or retreat, a good support isn't going to fix this at all. They can make it less likely a team mistake ends up in a catastrophic failure that costs the game, but they can't fix a catastrophic failure of a team in the first place.
4) As DPS. If you are the pure dps char on the team, you still have to rely on a tank that knows what they are doing. A good support is nice as well. I'm not talking about a support that is playing a gung ho Soraka trying to starcall to death the enemies in bottom lane at level 1 while stealing all the CS. That is way too common a problem I run into when I play the DPS role.
Personally when I do DPS or bruiser I like to be in the solo lane. I KNOW I am 90% of the time going to win that lane or keep it at a wash. I rarely ever lose a solo lane. Unfortunately I get so many people that demand and cry over having that solo lane. Only to watch them lose it horribly and early.
5) As a bruiser. At least as a bruiser I have the "least" problems. I'm not as nearly considered about a tank that isn't initiating or not being tanky enough. I'm not considered about DPS not dishing out the damage as much as they should. Why? Because as a bruiser I can usually take up the slack in either case. I can't take up the slack in BOTH cases, which does happen, but if one or the other is lacking I can shore that fault up on my team with a bruiser.
Again my only real problem with bring a bruiser is getting true trolls in other lanes. I may be doing awesome with 5+ kills in my lane and tons of CS, but the other two lanes all have 5+ deaths each and little to no kills. Then they just give up. Some bruisers can carry better than others, but nothing can be done if your team quits cause they sucked early and hardcore.
That's been my experiences thus far.