No marriage is one person's failure any more than it's one person's success, so it works best to see a marriage that has ended simply as something that didn't work out.
Perhaps the old view of 'Me breadwinner, you hausfrau' worked for our grandparents, when people obligingly popped off before boring each other to death, but it won't work any longer because we are living too long and divorce is needed today to do what death acomplished more economically before.