Well in my opinion marriage is often fails because there is a lack of basic compatibility between the partners. The very idea of marriage and romance has been so tarnished by popular culture that we are literally living in a bubble and presume that whatever is being fed to our minds is also true in the reality. In terms of relationships, we have very irrational expectations from the real world and as a result, when a person enters into a relationship, they met with horror. The popular media is trying very hard to compartmentalize the very idea of relationships into fine prints and it is making believe people if they are not part of the norm then they can’t have a successful relationship. People fail to understand that marriages and relationships cannot be defined into watertight definitions. The whole idea of a relationship is so substantial and personal that a person should choose his relationship according to his own needs and requirements.
The problem also lies due to the fact that no one teaches us about these things at home.
These things are so are considered as Taboo and hence of unrest under the carpet. Boys are not taught how to communicate well with the opposite gender and as a result when real-time comes they fail to communicate properly.
Also, the whole system of arranged marriage is a flawed one. Many times couples are forced to become partners owning to family pressure. this has led to so many broken homes and failed marriages.