I'm sympathetic to the idea that Uber has lots of headwind. As mentioned, the majority of costs scale with revenue in a way that isn't true of real tech companies and the autonomous driving thing is basically dead. But there's lots of reasons companies could fail - it's not enough to list them.
One glaring hole I see in this analysis is the monopoly view. Uber is establishing itself as a monopoly in some markets and pulling out of the ones that it's failing to achieve that. A pretty straight forward step would be to start jacking up prices in areas they have a monopoly whilst simultaneously driving out the competition. That would be profitable and it addresses the problem the article proposes.