Why one million, something you just came up with to prove that marriage is not working?
As far as I can tell, marriage numbers are trending downwards including the nett marriages. This despite the overall nett increase in population annually.
The only thing stable is the divorce rates are also trending downwards in somewhat similar rate. Nonetheless, the average of 40% is quite indicative of poor success especially there are countries with less than 1 %.

This is mainly due to toxic gynocentric culture which allows divorce to be an easy process with no need for reasons. Feminism is one of the main culprits.