It’s already been said that divorce & annulment are two different realities.
Civil realities and Church realities, see marriage and divorce differently. Civilly a person can divorce and remarry, no problem. Not so in the way the Church looks at divorce and a potential remarriage
As Jesus said, Divorce and remarriage is adultery.
An annulment, if one has received one, says, while a civil marriage took place, a sacramental marriage did NOT take place. (example at the end of the post)
That’s because marriage is a sacrament that both individuals, (each spouse) gives to the other. The priest doesn’t marry the spouses. He is a witness. The spouses marry each other. They give the sacrament to each other.
Annulment of a marriage isn’t automatic after a divorce. It’s a process that might take years. And after the process, an annulment might not be granted after the process ends.
After divorce, an annulment is required before a remarriage takes place, otherwise the parties engage in adultery.
Using that same example
If infidelity was the magic escape clause to get a divorce and move on never looking back, then if one spouse wanted out of their marriage, all they would have to do is have an affair, then tell their spouse they now have a valid reason to end the marriage and off they go. That’s a bit tooooo easy and self serving…right?
Especially as you point out, God hates divorce
Malachi 2:16 and one can’t play games with God on anything.
If spouses can’t resolve the difficulties in their marriage, and divorce happens, that doesn’t translate into each can then automatically remarry someopne else after they divorce. In the eyes of God and the Church, they are still sacramentally married until proven otherwise, even though they are civilly divorced.
Their previous marriage must be judged to have not been a sacramental marriage, which could also cover many other circumstances
For example:
realizing this is a bit broad in it’s application
If one has a prenuptual agreement, (depending on the wording and conditions of the agreement) that could show one of the spouses does NOT have permanency in mind for the marriage. They’re already putting in advance, an escape clause, for the possible breakup.
That would show faulty intention upfront of one of the parties. That person or even they together, did NOT give nor have the intention of giving the sacrament to their spouse.
Albeit an imperfect example