It's a rant about a bad review with accusations of bias because that reviewer gave another company a bunch of good reviews. With an added bit about how the reviewer was elected as an ENnies judge this year.
I have no idea as to the truth of it, but I have learned one thing over the last 12 years -- never complain publicly about a bad review. Because even when you're right, you come across as wrong. At the very most, a polite, friendly correction of actual factual errors, but even then you need to be careful.
I don't know how much effect the review would ever have, but rants like these tend to be detrimental. My professional PR advice would be to remove it.
If you publish, you get bad reviews. There's no way around that, and you won't agree with them all.