“When a man takes a wife and marries her, and it happens that she finds no favor in his eyes because he has found some uncleanness in her, and he writes her a certificate of divorce, puts it in her hand, and sends her out of his house,” Deuteronomy 24:1

God gave the Law [of Moses] to show us the nature of sin. Paul demonstrates this when he said, “I would not have known sin except through the law.” Rom 7:7
Without the law, you would not know when you do wrong.

You may ask if divorce is wrong.
Malachi 2:16 says, “For the Lord God of Israel says that He hates divorce.”
If God hates it then it is wrong.
That scriptural tidbit did not stop the Pharisee’s from asking Jesus the same thing in Matthew 19:3-9

Certainly, divorce is a terrible thing. It divides the loyalties of children, splits up property, causes hard feelings, unjust words, and irreparably changes the lives of all.

I am the product of divorce. It greatly affected my life. One good that came from it is I vowed at a young age to never put my children through what I went through. I determined to do everything in my power to stay married. My wife makes that easy.
It benefits our marriage that both of us are believers and seek God in our personal lives and marriage.
Paul alluded to these things when he gave instructions on divorce in 1 Corinthians 7:11-13.
Basically, he said reconciliation is better than divorce.
I have learned without death there is no reconciliation.
In a marriage situation when trouble disrupts one of the parties must die – give in, give up, be still, be patient, pray, and wait on the Lord.