An example still counts as an example. But I am fine with you wanting some winrate reduction.
Anyways,
The Boards complain about a lot of champions perennially. They complain about everyone from
(51.11%) to
(50.23%) to
(47.54%). The champions people on the boards complain about don't usually have a lot to do with winrates or champion performance.
The thing that favorite champions like those, champions like Zed, Lee Sin, Yasuo, Blitzcrank, Master Yi and Fizz the thing that they all have in common is that they kill you.
It actually looks to not even be about whether the player wins or loses the games. If it was, then people would be complaining more about champions who seemingly do far more to win games than them, champions like Sion or Leona. They would be complaining more about the utility focused and teamfight oriented champions who win more like
(52.62%). But they don't because their effects on a match are frequently harder to appreciate, especially in lower tiers; there is no announcement of "Tanking Sprees". What they do is not as readily apparent and nor as immediately frustrating as having to stare at a gray screen for 45 seconds.