Ideological incompatibility between the two?! Or maybe a lack of proper dedication to each other and/or a lack of honest bond of integrity as human beings between the two as well.

Lack of satisfaction in the relationship and living without any responsibilities manly causes major issues among the family life..... Finally both will get embarrassed. So definitely ends up with failure.

Lack of Communication is what I think that most marriage fails. For 5 years we've been married we don't have a fight with my wife because we talk if there's a mis-understanding.

The present culture, temptation for sexual role and uncertain affections mainly cause issues between couples.

it is due to things, some how not equally treated.
i wrote less, but covers more

This article was incredibly insightful. Thanks!