About the elo system and why tiers do matter
I've frequently encountered low elos (bronze/silver/golds) believe that they are equal to diamonds, that diamonds only get there by luck or getting carried. Putting aside the preseason and next season (where indeed, you can get diamond from getting carried by a 5 stack) here are some logical fallacies that low elos commit that make them think they're just as good as diamonds when they are not.
- "Oh but they only have a 2.8:1 KDA".
Why it is wrong: They have a 2.8:1 KDA against other diamonds. They don't have a 2.8:1 KDA against silvers.
Let's look at a random challenger player: http://na.op.gg/summoner/userName=Yami
I am in no way affiliated with Yami. I just looked up the challenger leaderboard and picked a random guy.
His KDA on Irelia is 1.93:1. His KDA on Lee Sin is almost just as mediocre.
Does this mean that Yami is worse than some random guys with higher KDAs? No way. Because Yami has a 1.93:1 KDA against pros and challengers. We're not just not in the same ballpark, we aren't even playing the same game.
- "Oh but they only have a 53% win rate, I'm almost as good as him".
Why it is wrong: He didn't have a 53% win rate when he was in bronze/silver/gold/plat or even diamond. What likely happened was that he got to D1 with a 60-70% win rate then as he grinded through masters and challenger, he fought against people equal to his skill and lost more.
- "Oh but they are one trick ponies"
Why it is wrong: If it was that easy climbing as a 1 trick pony, you'd be diamond too. But you're not, so it's obviously not that easy. In fact, I believe the majority of challengers are NOT 1 trick ponies. Yami in particular has almost equal number of games played across all his champs.