For all the criticism HN might not be the target audience/market. So advise is very difficult. Generally I think it is a marketing problem. There are a lot of successful authors who only became successful after a couple of books and the books that didn't sell were also fine. (after the author beeing known the book sell)

For an unknown author marketing is important (and for this book putting it in the shops at airports, railway station where people just want some 3h entertainment). So I think you shouldn't self publish but sell it through a publisher who has access to these channels.