In fact your comment could just as well be about many "unicorns" in tech who seem far more than willfully incompetant (e.g. Theranos; Uber); or according to who you ask Etherium (for being hacked and/or forking); and from the sound of press maybe MagicLeap the billion dollar startup who cant seem To launch a product may end up fitting the mold.
Sounds like Uber to me.
Yes people got rides and it's a good product, but they still took operations to cities/counties all over the world illegally. Drivers are the ones who are stuck holding the with damaged driving records, and in some cases criminal records, for nothing more that operating under Uber. For example in Miami alone there are still $3.5M worth of outstanding fines from drivers when they were illegally operating as rides for hire.
Multiple that by how many cities? Then extend that business model for to any other illegal activity: drugs, prostitution, murder for hire, etc... but you know hype ($50B unicorn) and marketing buzz (disrupting, sharing economy).
That's true of startups in general but not true of startups that goes through YC. The success rate of YC startups is far higher than normal.