Elo Hell does Exist.

Not because of the trolls or flamers. Those are always present.

If you have bad MMR or are in a low rank, you're going to be paired with others that are the same. They will be horrible players, with little common sense. Toxicity, just like trolls and flaming, are also always present. By being paired with these bad people, they will weigh you down, and you will delay your climbing for a ridiculous amount. This is even worse when you have the "-20 lp when losing, gaining <20 when winning." You have to go on a ridiculous streak to win. This will happen in every rank. Bad players will keep you back and you can't do a thing about it. You'll have supports going full dmg without sighstone and taking Mejai's when 3/6. You tell them to get a sightstone and not go full damage, in the nicest way that you can? They retaliate with toxicity. Lose-lose situation. Either generate toxicity or lose the game.

People will be bad in their gameplay aspect. You can't do a thing about it. There's no solid advice you can give without sitting down and writing an essay on how you have to keep moving to dodge skillshots as you kite, that you can't just stand in one place and AA. You can't do a thing about it and you will lose.

Those without common sense, repeating the same mistakes, not reading patch notes, facechecking bushes and whatnot. Tell them not to do it nicely, they do it again. It will be a setback.

It's just a gamble of who has the better team and better team comp. Things that are out of your control(when you can control the "team" aspect of the game, you will dominate. See last season's DynaBoostQ). You get an "offmeta" pick on your team, chances are you will lose. This isn't the same as "offrole". You can pick a meta champ and go everywhere. The gap between meta and nonmeta champs is so vast that you can do anything with meta champs if you're good enough. But picking something that's offmeta is just going to get you to lose. For those that are diehard mains of offmeta picks, the gap between meta and nonmeta champs becomes more apparent. You can be a god with Aatrox, and you can be a god with Yasuo. Who will have a higher winrate? Who will win the lane? Who will carry more? It's going to be Yas. Why? Because it's Yasuo, he's meta (for his own unique set of reasons; each meta champ has their own reason to be good) and Aatrox isn't. No matter what, when comparing two people of equal skill, it comes down to the champ.

You can't carry the teams anymore. It's a team game, and if your teammates are bad, even if you try to help them, you will still lose. Because they're bad. Riot will continue to implement and weigh "The team" more and more. It will only get harder and harder to solo carry.

For those that have played since the earlier seasons(S3, S4 etc.), you might recognize this.

#Drives towards the Team

Team-Based Champs(Kalista) Team-Based Mechanics Mechanism Rewarding Organized Play(Premading) Overloading and Creeping up(Mobility, Dmg,CC etc.) (Think about it: Once again, taking Yas as an example, you're going to need to work with the team to shut him down. You have to be good, and so does your team; perhaps a CC lockdown tank like Maokai in conjunction with a juggernaut like Darius) Fewer Wards per Person(You need EVERYONE to work together to ward, not just the support providing vision for everyone. To maximize vision, everyone needs to ward in certain areas) Placing More Value Towards Objectives(Adding Rift Herald for an Early Baron to get 2v2/3v3 Fights, Dragon for potentially 5 man fights even early on, making Elemental Drags to get more people to come rather than just ignoring the old drag, which just provided a gold bounty) Team-Based Items (A lot of these are support items, but you will need the team to work together to benefit the most off the strength of a ZZrot Portal) Making things based around teamfights(The last duelist was Fiora, there is rarely anything without a team-based gimmick(Ryze/Tahm/Kali) or making some aspect based around team-fighting; bullies have been watered down( , is one of the few bullies left, in the traditional regard(aka not ranged tops; those have been present since ),Zombies end up on the nerf stick( , Reworks tend to have taken away from the solo and 1v1 power and adding to teamfight power( )

#tl;dr Basically, to accommodate for all the "team" parts of the game that have been pushed, solo carrying can no longer be a thing.Most of the game will be won based on the performance of the team as a whole, and you can no longer viably be selfish in build path or playstyle.

Work with the team.