I logged in and clicked notifications. Am I supposed to not do that? Forgive me o great forum spamming god. I must have sinned in your eyes.
ALSO, your invalid viewpoints and biased claims due to frustrations against the champion do not represent the balance of the champion. The adjustment that gives Zed a stronger level 1-6 and weaker 7-18, while opening up his trade pattern to more than once every 22 seconds was and is fine. Calling it any more than that is silly and inaccurate. His rise to power can be attributed more to the power trimming of the S tier mages and items over the past several patches. ADC's complain about everything, that's their main skill. Their class is STILL the most powerful even after the tuning done most recently. Adc has and will remain to have the most impact on games due to their cost efficient and slot efficient items that they can apply frequently from range. I would argue that no support in diamond cares about Zed other than a few squishy enchanters like an unfed Janna and maybe Sona. Alistar, Lulu, Leona, etc. don't really care about him.
As far as your claims about the Zed community, we had a damn near unplayable champ for 2 years that we held on to. While silly people kicked and screamed every time they managed to die to him in low elo. (again no players in diamond cared at all when Zed was picked on the enemy team.) Meanwhile ADCs still cry while they have the most power in the game, mage players are equally over entitled on the 2nd strongest role in the game. They DEFINITELY have riots favor for items as a whole (both classes) If a champ we play is strong no one complains (refer to season 3 Zed, a strong champ that people didn't think was OP, but did his job) 51% winrate in diamond+ is acceptable. Considering how few people main him in each elo. Diamond: 1.6% of the players main Zed, a completely reasonable statistic. Devoting many games to a champion should result in a positive winrate. Asking for players with 200 games on a champion to have a 50% wr or lower is outlandish and objectively wrong. In master his wr is 50.6% which, again is even slightly low considering how insanely high the champion's skill ceiling is and how well you are REQUIRED to play him to compete at that elo. It could even be higher in my opinion. Also, again, Zed's damage was increased levels 1-6, after level 6, he NO LONGER GAINS THE AD REAP, making his scalings lower, his auto attacks deal less, and deathmark deal less. The only thing that could be considered a buff is his W, which AGAIN, is a completely fair buff that was a long time coming.
EDIT: I was incorrect, Zed's winrate in easier regions like EUNE, OCE, etc skew this winrate.
the major servers with good competition:
KR Diamond: 53.4% wr, mained by 1% of playerbase in diamond
KR Masters+: 52.9% wr, mained by 0.7% of playerbase in masters+ (it is worth pointing out how insanely small this playerbase is)
NA Diamond: 50.8% wr, mained by 1.7% of the playerbase in diamond
NA Masters+: 48.2% wr, mained by 1.9% of the playerbase in masters+ (it is worth pointing out how insanely small this playerbase is)
EUW Diamond: 51.7% wr, mained by 1.9% of the playerbase in diamond
EUW Masters+: 48.2% wr, mained by 2% of the playerbase in masters+ (it is worth pointing out how insanely small this playerbase is)
None of these statistics speak to support your claims.