I'm not mad about anything, but I wouldn't need your permission to be so.
I've learned from this thread that I don't want to use HA in the future.
Who said that you would have?
I mean I can see the "I think your judgement is bad" could be seen as a personal insult (even though it is genuinely meant as an assessment of reality), but "multiple"?
The sentence structure implied that I would have personally insulted this HN user and did so multiple times.
That is not true though.
What you did probably sense instead is more of a general abrasiveness-field. That was intentional (and obvious, for that matter).
It was (and is) a never-ending drama faucet, because most people are in it for the identity and not for the utility. Or rather the utility primarily is the identity granted by using it.