Everything you need to know about Lee Sin

You've probably already downvoted the thread at this point, but, the boards have become frustratingly clogged with so many threads bashing him that there's a lot of common misconceptions that definitely need to be cleared up because it seems like everyone is excitedly circlejerking one another about information that probably isn't all too credible.

The "Winrate doesn't matter" Argument One of the most frustrating points I see about Lee Sin is that people say "Even though Lee Sin has a low winrate, it's because the bad people keep playing him that his winrate stays low," but then they contradict themselves with arguments saying that he's not a difficult champion, or that the only reason that he is fun is because winning is fun. However, Lee Sin has been consistently plagued with a low win-rate and this probably isn't for the reasons that you think. In fact, according to champions.gg, most of the most common playing strategies (Items, runes, masteries) don't really make that much of a difference. The way that everyone is playing him right now is pretty much the same, with little variation. Most of the specifics don't really matter in the long run at all. He's losing more games than he's winning and even for experienced player, his curve of "games played vs. win rate" is still far below many other champions (compare to Fiora, or Graves for example). According to numbers, he is pretty much not that unique, carrying a similar role as Renekton might have; he is a pest and extremely strong early on, but later on he's not all that useful. Of course that's a bit generalized but sometimes the most oppressive things end up failing in the end (like we've learned from marksman top phases).

The "Numbers are too high" Argument One thing about Lee Sin that also is commonly referenced as his "most overloaded" feature is that all of his numbers are way too high. Most players think that just because a Lee Sin is doing a lot of damage, he's automatically overpowered. However, most of Lee's damage comes from the bonus AD scalings on his abilities. His abilities scale ridiculously off of bonus AD which is why you never see a fed Lee Sin rushing juggernaut; he's not going to provide any damage by going tank simply because all he has going for him at that point is the base damage of his ult and situationally the percent missing health on the second toggle of his Q. After he gets ahead by building damage, he can then focus on getting the tank stats to get durability while perpetuating his damage output that he has already built up. Other champions do his job better - champions that want to deal pure damage definitely can do it better than Lee can, like a Rengar being able to burst ANY target however he wishes, or a Sejuani being able to tank far better than him. He's just somewhere in the middle and is so perfectly between the two that it seems to many players to be the perfect balance of both sides which makes him seem oppressive for being good at both.

The "Mobility is OP" Argument Most people have a frustration with the amount of mobility that Lee Sin has in his kit. First of all, this isn't even a point that has to be argued for too long. Because there are so many other champions with similar mobility in even more useful situations. Lee Sin uses his mobility to pick his fights in order to best gain advantage, just like Zed can get in and get out after choosing his target in a heartbeat with a safe escape, or how Vayne can use a constant series of tumbling in order to kite herself better, or Kalista can kite through her passive, while Fiora can dash around by hitting objects with her Q to reduce the cooldown. The point being, every champion uses the mobility in their kit to their advantage and this might make the champion's identity, but also provides the frustrations of the champion. Mobility is usually the most picked on reason that a champion is imbalanced and in comparison to others, Lee Sin isn't all that unique in his ability to get around a lot.

Point being, just because he's frustrating to play against doesn't mean that he's overpowered. If he's not winning his team the games, it can't really be said that he's overpowered. An overpowered mechanic causes a champion to be able to win the game in most situations reliably or give them a game-winning advantage, because in the end, the game isn't really about who can deal the most damage or who can oppress the enemies the most, but it's about who can win the games most often for their team.

TL;DR: you can give the boards as many numbers as they want but to be honest they don't really seem to care