She is not OP! You just don't bother to look at what actually killed you.
I've been thinking about which adc I could compare Zoe to, and I've got one: Caitlyn. Caitlyn sets up traps, sets up headshots off E, has a long range cannon, and I've actually hit 3700 hp Crit with Caitlyn's Headshot. And hers.... is on an auto attack.
If you see a Zoe's Q do 3000 much less 3700, give me a pm. Her highest potential pre mitigation Q is about 2500.
And, she's about to get nerfed into the ground:
Reduced aoe size of E trap
Reduced range after a wall of E
W Summoner's only last 20 seconds on the ground, making it extremely hard for her to use out of mid lane.
Q's cooldown is going to start at the end not the beginning of cast (So she's going to be a slow slug)
Drowsy duration longer up to sleep for people to do more about it.
Drowsy now removeable.
Drowsy's slow is less, so people can do more.
She's already extremely counterable, high deaths, and iffy on kills. But because low elo players don't learn from failure, she's about to be nerfed from a 47% win rate to a friggin 30% win rate.