I'm glad I've never really needed Uber, traditional taxis have their problems but there's no scoring involved.
Edit - Missed a few words.
Maybe they think I'm rude, but I've paid them and thanked them, and I've not caused them any trouble.
I'm not from America, so maybe it's slightly more acceptable to do that but I could just be using stereotypes of Americans to explain the taxi scoring behavior.
I rate you as a 3/5.
It's crazy this system is perfectly acceptable.. But the Chinese system aiming to do the exact same thing? Completely unacceptable...
Unfortunately people are shitty and this is a very much needed feature to avoid abuse of drivers.
One of Uber's selling points was that it avoided the kind of discrimination that taxis were famous for.
I've heard of taxi drivers complaining about drunks, people with food and stuff, but AFAIK taxi drivers in the UK are allowed to refuse service for things like this.
If the system were such that drivers would only leave negative feedback on exceptionally bad encounters, with a specifically described complaint, it could plausibly work as you state.
But as it stands, your "shitty human being" is likely to not be correlated with a poor average rating - imagine a run of the mill douchebag that talks themselves up to everyone they meet, yet is an abusive asshole when it benefits them. Such a person is likely to have a higher passenger rating than a genuinely nice person who is socially awkward.
All systems calcify, become overprescriptive, and get gamed by people with nothing better to do. This setup is ripe for that, and Uber's / Surveillance Valley's general stance towards accountability doubles the worry.