I could relate to how you feel. I think your original idea to find new people is novel and not yet clearly solved. I think failures are part of a startup. Th

I could relate to how you feel. I think your original idea to find new people is novel and not yet clearly solved. I think failures are part of a startup. There should be no reason why you should feel "frustrated" and "pretty useless". If not for anything else you would be in a very good position who could solve the problem of meeting new people with all the learnings that you have now from grooovy. Its only your approach to the idea that failed. Not you.