Answer: When the person you’re speaking to can no longer influence your future.
Otherwise, you express your departure in terms of having found a better opportunity.
I recently found the original draft of my resignation letter from 13 years ago.
My boss convinced me to replace it with a short “found a better opportunity” letter.
As a result, he hired me back 3 years later, when I discovered the grass was NOT greener.....
Zackly.
Never burn a bridge.
“To Whom it May Concern,
Effective xxx, I resign my position with xxx. Thank you.
Sincerely,
xxx”
People who write long diatribes are fools.