Well, you should be aware that a lot of people who spend a lot of time on HN are bitter, because their own ideas did not flourish and they are stuck in a mediocre job, so wandering on HN and alike to get inspirational spirit, but with jealousy, so not eager to love new things at first sight, but to smash them. But they are also able to applaud something if they love it.

So of course it is possible that your work is not the best, if random internet strangers can crush it easily.

I found HN to be a much nicer place than most other places on the internet, but still, you should not expect anonymous people to be nice. Not in this internet, not in this world with all its freaky, unhappy people. Happy people usually have other things to tend to, that makes them happy, than posting all the time. So don't take it too personal. View it as a challenge and don't try to please a internetmob.