It was significantly downranked after about an hour on #1: https://hnrankings.info/40481808/

Yep, from #1 to bottom of the first page in 5 minutes...

Looks like a group of people decided to bury it

It is actually more likely it is the opposite, that it got temporarily boosted to get exposure, and then fell back as interest vaned. If mods want it gone, then it will be gone.