Did you get any users during your launches? If so, I'd consider them a success. The idea that you get flooded with users after a single launch event is a myth. I see the process like this:
1) Some kind of press release (TC, Show HN, blog post, etc)
2) Get at least one user
3) Iterate features and establish that the users actually need the product (would they be upset if you quit?)
4) repeat 1-3