I don't know why but sometime ago, HN started resembling reddit, and there seems to be just widespread fear/jealousy/cynicism towards anybody advertising their work or services even, I don't think there was anything wrong with your post, it was informative.

Probably the most annoying part about Reddit and HN and X (although it let you mute people) is the abundance of "expert" opinions from people who aren't experts at all. You just end up with a bunch of false signals that you shouldn't even be listening to.

all in all I say invest in spreading the words via other channels, maybe even X is better and even the right time zone (besides US working hours, I find European time the worst statistically for sharing your work).