First and last is worse because having first name registered as family name adds extra half a day to your schedule to be spent around support desk, and given/family nomenclature exists because it's just unnecessary pain.

Your partner and billion others from their cultural sphere with single-field name system is a testament that concatenated two-field name system is the problem and is actually not working due to the falsehoods, not that the first/last nomenclature is better than given/family which is much less ambiguous.