Whether their marriages "worked" or not is up for debate too! Men set their wives aside enough for leaders in the Bible to have to address it. Moses permitted divorce due to hardness of heart.
There was infidelity (Gomer)
There was lust, adultery and murder (David)
There was fighting, jealousy and manipulation (Abram and Sarai, Jacob, Rachel and Leah)
Abraham pretended his wife was only his sister, throwing her to the mercy of the people around them who wanted her because she was beautiful. Not very loving or honorable.
There is nothing new under the sun. The heart is desperately wicked, and there always has been and always will be depravity among people, even God's people, while we remain in these human bodies.