And it everyone would have played happy families and it would have been boring as hell.
Not at all. A show doesn't get boring just because people are NOT unprofessional, incompetent dicks.
In fact, having well adjusted protagonists who generally get along makes it easier for you to like and therefore care about them, which enhances the drama. Having a cast full of people who argue about everything
all the time just results in wishing most of the characters would die.