All I see in that conversation is risk of offending someone you need for a future reference. Employers are unlikely to get the whole truth even if a discussion

All I see in that conversation is risk of offending someone you need for a future reference. Employers are unlikely to get the whole truth even if a discussion takes place. I've always told my boss briefly in person and followed up with a letter. The letter is necessary documentation. It provides proof the resignation occurred (or provides the starting point for a criminal investigation if forged).