From my own understanding and then my own way of explanation I know very well that marriage is a union and it is because of her character of the two parties that will make a marriage to last very well mentioning the name of God is good in marriage but marriage is being determined by the two parties character so they characteristics of the two parties which showcased how their marriage is going to last or not
The character of the two people will determine if the marriage will last or not. When the character of the two people does not match I don't their is anything God can do. Marriage is all about understanding, and when their is misunderstanding all the time it means the partners are not compatible in character.