As a Chinese national, I disagree. Taxi experience in big cities in China is generally better because of heavier regulation and competition. In many medium to small cities, it is far worse. Now note Uber only compete in big cities while Didi has already been operating in many smaller cities with large market share. Yet Uber still fails to expand to where ride hailing by app should be popular and desirable.

Scooters? Everyone hates them.

Personal experience: my hometown is a medium city (with a population of ~3 million in urban area), the taxi system there is so broken. Because of the medallion system, to maximize the profit/cost ratio, taxi drivers usually operate their cars 24 hours a day with two shifts. Day shifts are usually taken by locals, and they will try their best not to serve you if the trip goes through traffic-jammed area or remote places. I understand their economic reasoning though. The worst part is every afternoon from 4pm to 6pm, when shift change happens, every taxi driver will refuse your ride request unless you happen to be ride sharing with them to their shift change stops(pretty ironic I think). So as a rider you basically beg for a ride.

That's how Uber/Didi win. You don't beg, you don't worry, you don't get pissed off. You uses an app then you get on a car with better fare (thanks to those steep discounts)

Remember, this is just one city with population of 3MM, there are more than 100 of such cities (with population of 1~3 million) in China. But Uber is not operating in my hometown, let alone many others.

Uber is slow to adopt Alipay or Wechat pay. Uber is slow in expansion.