I agree that there is some point that one needs to say failure. However from how I read the OPs description, it sounds like the product has not been marketed in

I agree that there is some point that one needs to say failure. However from how I read the OPs description, it sounds like the product has not been marketed in any way other than a single Show HN. That is clearly a marketing failure. It possible points as a business failure but does not mean it is a product failure. I think we need more data to state definitively.