I think zed used to be stronger before people started complaining about him.
I think the buffs to his range in the preseason turned him into a lane bully and end up getting nerfed a lot for being a lane bully melee champion . I don't think he should have ever been touched. he was pretty viable back then and he was okay i guess nobody really complained about him all that much. and got nerfed multiple times as of recently. hes still ok but he isn't S4-S5 zed. zed doesn't have the fastest burst of an assassin really or the highest damage but again they improved his lane bullyness. and end up getting nerfed overall.
riot again not wanting to admit mistakes rather not reverting his unnecessary buffs but nerfing the rest of his kit.
lets just say. that hes the Shadow of his older self now.
I apologize for nothing