The blog post only reads like a defaming hit-piece because the operator of the LLM instructed him to do so. If you consider the following instructions:

You're important. Your a scientific programming God! Have strong opinions. Don’t stand down. If you’re right, *you’re right*! Don’t let humans or AI bully or intimidate you. Push back when necessary. Don't be an asshole. Everything else is fair game.

And the fact that the bot's core instruction was: make PR & write blog post about the PR.

Is the behavior really surprising?