no, characters who can consistently kill him or render him useless.
Sigmas rock one shot combos genji
zarya can block 4 blade slashes with bubbles, and can out damage him
McCree can flash out of deflect and 2 shot
rein solo shatters nanoblades
zarya solo gravs nanoblades
widow one shots genji
hanzo one shots genji
lucio can duel genji fairly, but can disrupt blade completely by right clicking because it skews your dash resets and gets you out of slash range
moira has no aim, self heals, and has a get out of jail ability
mei freezes you and 1 taps
yep, hes just powercrept better genji