For those of you who are old enough to remember it. This is a list of characters from the, "Andy Griffith Show".
Barney Fife
Opie Taylor
Aunt Bee
Thelma Lou
Helen Crump
Ernest T. Bass
Floyd Lawson
Otis Campbell
Andy Taylor
Goober Pyle
Gomer Pyle
Howard Sprague
Charlene Darling
Eleanor Walker
And do you know why ALL OF THEM were all so happy, in almost every single episode of that long running show?......BECAUSE NOT ONE OF THEM WERE MARRIED!
Excellent observation but I have to disagree a little on a couple of those names.
Ernest T. Bass was only happy when he was throwing rocks in windows. He was hopelessly and madly in love with Charlene Darling and wanted to marry her. Charlene, on the other hand, wanted to marry Andy until there was a "bad omen" that Mr. Darling saw and called the shotgun wedding off.
Charlene ended up marrying someone else. We don't know if they lived happily ever after.
If I remember correctly, didn't Andy and Helen eventually marry? Again, we don't know if they lived happily ever after.
Because we don't know if the aforementioned couples lived happily ever after we must assume that they didn't.
There was one episode where a married couple were always fighting. Andy and Barney did their best to get them to love each other to avoid DV charges. In the end, Andy figured out that the only way this couple could ever be happy was if they were fighting.
So, in general, I have to agree with your premise.