they had a great brand and the only thing they had to do was not fuck it up before they reached the next level. and instead they spent most of their cash on fighting rivals, built a culture that is eroding the brand and behind on the next thing in transportation.

Uber’s global sales are still growing, with first-quarter revenues surging to $3.4bn, triple the levels of the previous year. However, its growth rate in the US is slowing and investors have become concerned after a period of crisis has left its top ranks in disarray.

In other words... the company is still growing massively, from a large base. It's just not growing as fast as it once did. As happens too often, the headline doesn't match the data.

Notice the trendline, and how late 2016 was above the line, then the correction, and back to trendline.