Why Ranked System Doesn't Work For Everyone.

So i played a game with these two people who were about 100 MMR below me, no big deal right? Im Silver I they were Silver II so it makes sense we would be matched. Well we lost and they were pretty terrible, at one point one of them threatened to AFK if another player didn't make a decision on a strategy, they then stood still an died for it. The other picked a champion simply for the new slayer skin.... performed terribly too... Anyways what does this have to do with the Ranked System? Well i decided to check their match history, sure enough this was not the only game they did badly in. Plus having played with them and seeing their lack of basics (such as moving while fighting instead of just standing still...) its clear this is not just them having a bad game.
Out of the 20 games i could see both of them consistently went negative, a lot of the time having more than double the deaths as their kills. Since both tend to play carry positions, its not just that they are playing non-damage champions. So they are clearly being carried by their teammates, who were performing well enough to carry from what i can see. Why does this reflect negatively on the Ranked System? Well these two are placed in the wrong rank... They can not keep up with the level of opponents they are playing against and can not keep up with their own teammates. We all have those games where we do bad, sometimes it last several games, but rarely does it last more than 20... I mean it is obvious they are being carried. This is the issue with the Ranked System where your rank is based on your teammates. Some people are being carried by always getting good teammates and others are held back because they can not carry their bad teammates.

This is something i really hope is addressed in Preseason for Season 6, these two are not falling out of Silver at all because they get these teammates who can carry them, they probably never will and will always be a burden on their teams. I don't want to suggest more punishment for losing and punishment for going negative because sometimes your KDA doesn't matter and sometimes you lose a few games just because thats how the game works, someone has to lose. I don't really know how to solve this without screwing over someone and helping others...