The real fault lies with both parties for not setting expectations. A lot of the requests from the founders seem very reasonable; I fully expect them to be telling their friends about this bad hire who never executed on the details for them. Neither of you seem to have done the hard work up front of conveying what you needed and expected from the other side. I can see the other side of the data points you show - weekly revenue need not be the right thing for the company, startups need detail often more often than execution and guess what, VCs do care about the actual idea. It also sounds like you were surprised by the risk profile of an early stage startup (and your notion of VC vetting might be in for a harsh reality check).
What I don't understand is this post itself - you seem to blame YC for what seems to be a typical startup experience (not raising funding is the median outcome and even folks like AirBnb struggled with this for a long, long time). I'm wondering whether the way you've constructed this post with an anonymous post on a blog, the callouts to their funding situation, etc is meant to hurt the company's future prospects by making them identifiable (and maybe take a swipe at YC too). I hope that's not the case here.