Having spent years working at multiple SV tech companies, where even the slightest tinge of a racist or sexist affront would land you in an office in front of HR and a company lawyer, I find this account to be very difficult to believe. Slanty eye joe? Please.
We don't know if this is a (poorly written) attempt to sink Uber (which I don't happen to care for) by someone with a short position and an evening to spare, or if it has been penned by an employee with a grudge.
Please have some credulity before parading your #deleteuber hashtags and morally superior posturing so the world can marvel at how virtuous you are. There has never been a more evil force in the world than an outraged, self-righteous mob inflamed by twisted anecdotes.
And yes, I've resorted to creating a throwaway account, fully expecting the flagging and down-voting groupthink brigade to be in force. If there's a shameful story here, it's more likely this disturbing human phenomenon, not an anonymous blog post, the veracity of which we know nothing about.