Is a happily ever after a myth?

Of all the couples I know, there is only one relationship that is healthy and going strong. Everyone, I mean every one, even those perfect couples you see here and there have huge skeletons in their closets. Divorce is not very common in my circle but most of these couples are so bitter/miserable/indiferent to each other that it seems like the only secret to a long term marriage is putting blinders on or lowering your expectations.

Is the happy 50-60 year old marriage just a myth?