The best way to avoid a bad marriage is to become a godly man before marriage and marry a godly woman. If you marry a modern woman who’s swallowed the lies of this sinful culture, you can guarantee yourself a miserable marriage.
Imagine going to the doctor because you feel unwell. Upon arriving, you demand he give you an in-depth blood test, an EKG test for your heart, and an MRI of your whole body.
God can do anything he wants, whenever he wants, and by whatever method he wants. So if God doesn’t want someone in your life, why wouldn’t he just remove them instantly rather than “trying” to remove them?