at the end of the day it's just an app... there is no Uber infrastructure such as a bus stop... very few real assets... and not a ton of IP if every car company, Google, and others are competing.
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.