Marriage requires constant effort and work by both parties. The expectations are different today than they might have been in our parents and grandparents times. What is of utmost importance is to treat your spouse with respect and not to take each other for granted.
Simple as it sounds its adherence affects every waking moment of the day.
All problems usually start from failure to respect these tenets.
This is not to say that sometimes people are genuinely non compatible and should seek counselling. Divorce should be a last resort and not a quick exit strategy as it is today.
For the most part, most people are not better off after a divorce unless there was physical or emotional abuse taking place.
I strongly believe that just as there are chosson and kallah classes, there shiuld be pre marital classes required for all engaged couples be they Litvish Chassidish YU type etc. We are all subject to the same knee jerk human behavior that has to be controlled when one gets married.
PS. They once asked this couple who were married 40 years as to whether either one ever contemplated divorce. The husband responded by saying : Never divorce but quite often murder 🙂