Spousal Separation

A circumstance where a married person becomes irrationalistic after they were married or where they refuse to surrender some asinine trait is a horrible one for all involved.  Neither person is likely at subjective peace and the irrational individual is objectively in the wrong.  No one irrational--no one assumption-driven, carelessly hypocritical, selfish, possessive, or emotionalistic--deserves to be married or should be anywhere near involved in a romantic relationship of any kind, but unfortunately marriages are formed where this truth is disregarded or where someone descends into unrepentant folly after the formal commitment.  Marriage to a fool is a hellacious status that could motivate someone to pursue divorce, suicide, or deserved outbursts of loathing.

The annulment of a marriage, not in a legal sense but in a relational one (legal systems are social constructs, unlike logical truths or people themselves), is utter deliverance in these cases if they feature certain factors.  Yes, the Bible allows divorce in far more than one instance (see Exodus 21:9-11 and 1 Corinthians 7:12-16 beyond just Matthew 19:9) since no failing romantic partnership is as important as the wellbeing of an oppressed spouse, even if he or she is "only" being emotionally neglected or abused, such as by legalism, flippancy towards the marriage, or weaponized unjust comments.  Divorce is outright wonderful in such situations.  It is a way to regain stability and freedom after being confined to marriage with an unworthy person.

It is also not the only option for a struggling couple, and this is not just because there is also the option of reconciliation within the marriage.  Spousal separation, the temporary living apart of a couple despite their relational and/or legal marriage, is always a possibility for those who do not want to actually divorce but desperately need time to think about how to handle their relationship.  Moreover, the simple act of separating for a time could apply pressure on an irrational husband or wife.  The offending party could realize the sincerity of their partner or the depths of their own stupidity.  If they really care about the marriage, they would be able to resolve the problems that stem from their own self.

Not all marriages are worth saving even on the Biblical worldview.  Indeed, sins like rape within marriage (Deuteronomy 22:25-27 says rape is like murder and deserves death) and adultery (Deuteronomy 22:22) are both capital crimes, so the real default should be neither reconciliation nor divorce, but execution.  No, the contrary idea is a glaring lie believed by non-rationalists who are not familiar with the real teachings of the Bible.  Divorce still does not have to be the first thing someone leaps to in marital trouble, not that every single marriage problem Biblically legitimizes divorce.  When attempts at reconciliation or confrontation fail, living apart without forsaking the actual marital bond is a great way to reflect on the nature of a marriage or pressure needed changes without directly charging down the road to divorce.