It feels like some people from every ELO are good.
I've just been watching some of the Higher-ELO players (Which I'll keep unnamed to deter any "LOL they're not good" arguments), and they're in games like, Diamond, and Masters, and stuff. One game was with a Kai'sa. One instance, he uses his W on a half-health enemy, ults in, and gets a kill. Woo hoo. A few minutes later, in a teamfight, the enemy Singed ults and starts B-lining it for Kai'sa. She does everything she can to avoid him, but he inevitably catches up, flings her into a bad position, and she dies. And it makes me wonder.
Doesn't that exact same stuff happen in Silver? I sure as hell see that all the time. When people talk about how majestic players in Diamond+ are, I would always wonder what they would do differently in certain scenarios. If you've already blown your flash the last time Singed B-lined for you, and your team doesn't manage to lock Singed down to keep you away from an immanent demise, what's the difference in options between what a Silver player would do and a Diamond? Possibly use your ult to blink an extra two feet away to buy you an extra second of time? Dive in, let him fling you right off the bat before ulting onto the outside again, praying the enemy doesn't nuke you in the 0.75 seconds you're unable to perform actions in and praying that Singed's crystal scepter doesn't leave you slowed as he catches back up to you afterwards?
Here's what I think. Thanks for the mediocre skill-ceiling of some champions, it's hard to be anything other than a "good" player or a "bad" player. Farming, last-hitting, freezing waves, knowing your kill-potential and limits on when to do things, map-awareness --- those are all knowledgeable traits a person either "does have" or "does not have." Being "good" just means you're at the very least knowledgeable of what on earth you're actually doing in-game.
So, what do the different tiers represent? Well, it seems they just represent the percentage of good players. And in each diving upwards you go, that percentage rises, as all the absolute tossers stay trolling down below. There will be a few horrid players in Diamond+, because a few people got boosted up there, or because a Diamond player just got out of the hospital after receiving brain surgery and decided to unwind with a couple Ranked games. Silver is gonna have a whole lot more bad players, because Riot allows level 30 accounts into this ELO, and these people have absolutely no idea what they're doing half the time.
TL;DR: Please put the feeding, brain-dead miscreants on the enemy team, Riot. Please. It's been 7 games in a row. Stop it.