I hope you never find yourself in the position I was in. After 37 years of marriage, my wife wanted out.
It happens. Look at the statistics. Are you willing to say that 50% of people who get married are amoral because they find they can no longer live with that person that they once loved and now find that divorce is the only option they have to find happiness in their life?
Don't be so quick to judge.
I don't stand a chance of getting married at this point (women view me with contempt the moment I bring up anything further than "friendship" and the older I get, the harder it's going to be for a working-class man like myself to find a partner) so it's moot. But yes, I believe that marriage is something permanent, and that far too many people give up on it too soon. We did not have these problems before the sexual revolution. We as a society have lost discipline. We expect emotional love to conquer all now, when it's nothing more than a feeling, fleeting and transitory. We can't tell difference between opposite-sex and same-sex relationships, even! How our society views relationships is so massively messed up that yes, there is a lack of morality.
And perhaps that is why I feel like a lonely voice in the desert, calling out while no one listens.