I know a sister who was coerced into staying with an abusive husband. He ended up raping her daughter by a first marriage. This was a case of a marriage that wasn't "made in heaven".
The dating rules, empahsis on not being worldly, marrying only a "spiritually strong" person all contribute to bad marrieages. As do the big expectations and lavish starts.
My own opinion is 2 people should "drift" into a relationship (marriage), and also the family group should encompass a clan.