I don't believe you. No offense, but it's easier to learn that the Earth is flat, or that a place called 'Australia' exists, or that reality is entirely a consensus affair and that strenuous wishing can change it, than it is to learn that Uber is easy to contact. Some lies people don't bother spreading.
If you lucked out and found that your specific issue had a UI entry in the app, that's not the same thing as being able to explain a situation to a human and have that human do the (paid, drudge) work of wading through obscure interfaces to find the button that fixes a given problem.
Just look: https://duckduckgo.com/?q=complain+to+uber
Or look at this article about Uber deliberately hiding a contact number "to test discoverability" (meaning: if users find it too easily, it should be made harder to find) https://www.theverge.com/2016/3/10/11196352/uber-secret-emer...
If you lucked out and found that your specific issue had a UI entry in the app, that's not the same thing as being able to explain a situation to a human and have that human do the (paid, drudge) work of wading through obscure interfaces to find the button that fixes a given problem.