Good news for those trying to rank up, "Elo Hell" DOES Exist.
I know I know... a lot of players are saying that it doesn't but trust me, it does. Let me explain. The ranking 'elo' system was designed to be accurate over the long term, not short term. The more games are played, the more accurate it is. This could be a few hundred games, especially in Season 6 with the hard reset. Someone in Platinum 3 could be placed in Silver 3 from unlucky placements: Ex. Having four 4v5 games, two games with trolls, and two games you disconnected, and two games you won.
Assuming you win 100% of the games, that is still an average of 7 games per division for 11-12 divisions = ~84 games. Losing just ONE game adds THREE games to the number. If you lost a game, winning the next one brings you back to zero. Meaning you played 2 whole games for no gain. Most people who climb do so with an average win-rate of 55%, meaning you lose 45% of your games. Out of 100 games: 55 wins, 45 losses. With this basic understanding, in reality to get back to where you were (Plat 3) would be at least 113 extra games bringing your total to at LEAST roughly 200 games. This is assuming everything goes perfectly as planned.
Unfortunately, luck does play a big role in league of legends. Better players can and do lose to worse players. Higher elo players will still lose games to lower elo players. You can play perfect and still lose. Conversely, you can play a horrible game and still win or get carried. Sometimes you'll get five 4v5 games in a row where one person never reconnects. You'll get 'duo' who will only play certain roles no matter what, if you don't let them then they will troll.
In the short run (below a few hundred games), two identical players with the same exact skill level WILL end up with different results. One may win 20 games in a row while the other may lose 20. Now one of the player has to play a total of 40 games just to be even with the other person. This is 'elo hell,' it's the short and temporary but it DOES exist. 'Elo Hell' is simply the Elo that you're stuck going through for a certain amount of games, just because you're stuck for 30 games in a division does NOT mean you belong there. I can go into more details but it'll get too long (if it isn't already =p) I've made it to Plat 3 many times and I honestly believe 'Elo Hell' does exist.
in season 4 [slayer-pantheon-thumbs]