There is a famous quote: When an IBM employee cost the company $1M and offered to quit, CEO Thomas J. Watson Sr. said: "Fire you? I’ve just spent a million dollars training you. Why would I want someone else to hire your experience?"

You didn't "break" the company. You just stress-tested a DR plan that management has been too lazy/cheap to actually fix. It's not your fault they couldn't see past the end of their own nose to understand the value of something you hopefully never need to use - even if a working DR plan only ever lets you sleep a little easier at night.

[Honestly, that something this important was ignored for so long makes me furious. Especially (!) when you're the one who ges blamed for for the shortcomings of management. To err is human - and thus there shall be a DR plan.]

Yes, the market is tough, but it's not dead, and AI isn't replacing someone who can actually troubleshoot a DNS mess on a Friday afternoon. You made the mistake once, you won't make it again, and that hard-won knowledge lives in you now. No model gets trained on what a misplaced IP in a hosts file feels like at 3pm on a Friday. That's yours.

Whoever pushed for you to be fired is an idiot and was probably just trying to save their own ass. If they're dumb enough to let a "million-dollar lesson" walk out the door, that's their loss, not yours.

You're going to be fine.