Many years ago, back when I was a junior, I wrote something like this to my manager, complaining about another employee who has wronged me. I eventually decided not to send it because it just seemed so unprofessional.

Wild that a company this big would post this on their official, public blog.

Yep, that's exactly what i thought at first look. This looks like one of those "letting-steam-off" mails you bin after thinking it through after cooling off.