Thank you for the question on marriage, “Was it biblically that marriage is made to be for better or for worse?”
The phrase, for better or for worse, is not found in the Scriptures. That phrase affirms rather that the wedded couple will be faithful to each other regardless of the circumstances of life, for richer or poor or in sickness and in health. It a way to say for a couple to acknowledge that they understand what they are entering into with with wide eyes open of what may lie ahead of them. No one knows what the future holds, but they know who holds the future-God.
It is not biblical to think that God planned marriage to be worse. It is the couples own selfishness that makes their marriage worse or that circumstances may affect how they respond to each other.
Marriage doesn’t make one worse. Marriage reflects already what is in that person. It surfaces what is bury beneath the superficial conversations and actions. It’s when difficult time arises that one sees what one is really like and what the other person is like.
Ephesians 5 says this, “Husbands, love your wives, just as Christ loved the church and gave himself up for her 26 to make her holy, cleansing[b] her by the washing with water through the word, 27 and to present her to himself as a radiant church, without stain or wrinkle or any other blemish, but holy and blameless. 28 In this same way, husbands ought to love their wives as their own bodies. He who loves his wife loves himself. 29 After all, no one ever hated their own body, but they feed and care for their body, just as Christ does the church— 30 for we are members of his body. (NIV).
Marriage may make one better as one admits one’s weakness and fears. It is allowing the other spouse to support and to share in one’s life. If one has truly agape love, the unconditional love that seeks the betterment of the other person, one learns humility and servitude to others. It’s not about one’s comfort or what I want, but what is best for us. God intended marriage to make us better, not worse.
If our marriage is worse, then one must ask who or what is the cause of it and what can one do to resolve the pain/hurt in the other person’s life.
SUMMARY: Marriage reflects what is already in one’s heart and mind. That person has a choice to seek the betterment of us or of oneself. If it is for oneself, then the marriage will be worse.
For more perspectives:
https://www.quora.com/Was-it-biblically-that-marriage-is-made-to-be-for-better-or-for-worse