Well first, you took a well-meaning article discussing how HN can be toxic. Kind of a non-debatable thing, and you debated it. You started with "disagree completely" and I know you are COMPLETELY aware that emphasizing the completeness of your disagreement is argumentative.
While I don't think your comment is TOXIC I do think it suffers from the unkind, know-it-all argumentative mentality that HN has. So as a whole, it does contribute to the toxic nature of HN.
You are basically accusing the author of "only reading the toxic parts" without you knowing whether or not they did that actually. You just assume that's what they did. Which is called a "bad faith" argument.