I remember this events too, probably HN hate was not the main reason but probably it was the final straw.
Then you see some dudes ehre hating on snap, dudes calm down, your fucking flatpacks are not equivalent, they are GNOME/desktop centric, can't use them on a server.
I opened that post. The top comment asks for mixed DPI, trackpad gestures, and better power management. I had to scan (and click the next page thing) quite a lot to get to something that looked vaguely critical of Unity (and even then it was "collaborate with Gnome more"). I wish they took the other suggestions as seriously…
I am astonished at what a short memory HN has.
The Ubuntu project manager did an "ask HN" post on what people wanted to see next. It is here: https://news.ycombinator.com/item?id=14002821
The result was fairly overwhelming: stop Unity, Mir, the mobile stuff, etc.
So that is what happened.
I personally feel it was a huge mistake. :shrug: