As a Zed main I can agree that his late game damage is kinda bullshit. A decent while back they kept buffing his ultimate for lategame only which kinda turned him into a lategame monster that didn't really fix his suboptimal midgame problem (His winrate is actually worst during midgame). I really don't understand why they did this, buffing the cooldown to make it about 30 seconds lategame with 40% CDR and ultimate hunter, along with the death mark pop damage of his ultimate going from 45% of damage dealt to 55%, which even if it only looks like 10% is kind of absurd. Most games these days don't last as long so it's somewhat hard to find a lategame Zed, but if they do it pretty much becomes a braindead R, E, auto on most adc's. New changes are helping, but I really wish they could revert ult changes and put the power somewhere else in his kit that's more skill expressive than this current lategame bs.