TIFU by leaving a bad Google review for one of my company's partners

Keeping details vague as I'm still in deep shit for it.

My company has a partner company who has, through the years been "difficult" to work with. Shifting the blame for their outages, telling our mutual customers it's our fault and sending them to our support line instead of handling it themselves, etc.

The catalyst was a major outage that took several hours to resolve, with lots of back-and-forth and the usual amount of finger-pointing from them while we worked to determine the cause, which was ultimately the partner's equipment failing.

I, in a moment of frustration, wrote up a review lambasting their company, going into more confidential details than I should have for a public review, especially without clearance from my superior.

This review apparently got enough of their attention that it was passed up their chain of command, through to their CEO, who called our Director of Operations. Oddly enough the CEO wasn't exactly happy someone "representing a partner" wrote such a scathing and detailed review (thanks google for not allowing reviews to be anonymous, in hindsight I should have made a burner account). I allegedly "Undid 2 years of progress rebuilding bridges" with the partner.

If my company was in any better shape I probably would have been fired on the spot, but I wear too many hats to be fired effective immediately. I will probably be updating my resume though, just in case.

TL;DR I left a scathing review for a business partner, their CEO talked to my superior, and somehow I walked away with a write-up instead of termination.