The author is a woman. She does call a support line during the course of all of this. The support line was fairly unhelpful.

the support line did everything she asked, and explicitly asked if she already had a backup plan in place, to which the author said "yes".

the author admits to not even asking for the pump to be sent directly to her.

the author admits to even ignoring the internet advice to call support, then gets mad that she wasted insulin while doing so

"I will probably also be meaner to everyone who gets me on the phone in the future during an emergency. I was trying specifically to not do that, but I suppose it's helpful to be mean when your medical equipment is failing."

advocating for yourself is not being mean

No, but it feels that way if you're an agreeable people-pleaser. (This is, of course, a bad habit, but it's a common one, and it's not one that merely acknowledging will divest you of.)

Lots of mean things she writes in her blog post for a people pleaser though.

Like, I get it, but the blog should then be about how being a people pleaser almost killed her and not how bad support was at reading her mind.

It is.

> Admittedly, I did have an opportunity to cause a fuss which I did not choose to take […]

> This was dumb of me. I should have caused a bigger fuss. If I'd bitched to more people and made more phone calls and […]

> So I escaped this extremely risky and stupid problem - partially of the pump's making, partially of my own creation - with zero consequences other than the fact […]

> I hope that you can understand why - even when I made the situation worse by not throwing a big enough fit - I held in my heart […]

The blog post says things other than "this was all my fault" (which, channelling Nancy G. Leveson, is not something we should ever say about the failure of a complex system), but it does very much say what you say it should say. The vast majority of the "mean things" in this blog post are polite descriptions of the facts; the remainder are rather mild expressions of frustration, plus one death wish against a hypothetical someone exhibiting an extremely obnoxious communication behaviour.