I've always understood doxing to be PII, which aliases aren't, AFAIK, unless they're connected to a real person. And, to my knowledge, everyone is contending that the names in the blog post are all aliases. And, regarding aliases, I've never understood it to be doxing for someone to say "FakeNameX and FakeNameY appear to be the same user."
So, to me, the thing that makes it not look like doxing is that it simply doesn't meet the basic definition of doxing. It provides no PII.
"Dox" is short for "documents", and it originally referred to compiling a multi-page document of all known personal information, using disparate public sources: name, address, phone, email, employer, family members, family address/phone etc, etc, etc. It came from troll boards and was designed to make it easy to harass targets.
The term got significantly watered down when it got out to the broader internet.
https://gyrovague.com/2023/08/05/archive-today-on-the-trail-...
Even a half-assed attempt at doxing is still an attempt at doxing.
It'd be much easier to accept that you're acting in good faith had you deleted the post when it became obvious that the target doesn't appreciate it.
You could still do that, and it would very simply be the right thing to do.
I encourage everyone to read the original article and make their own conclusion. Do not take this poster at their word.