Your 40s are a major trough. About the age of 50 feelings of satisfaction begin to rebound and keep rising into your 50s 60s and 70s with health being a major factor.
No Congress ever has seen fit to amend the Constitution to address any issue related to marriage. No Constitutional Amendment was needed to ban polygamy or bigamy nor was a Constitutional Amendment needed to set a uniform age of majority to ban child marriages.
I'm glad I was born when I was. My time was the golden age of variety. If I were starting out again now maybe things would happen for me but it certainly would not be on a variety show with 28 musicians 12 dancers two major guest stars 50 costumes a week by Bob Mackie. The networks just wouldn't spend the money today.
A major advantage of age is learning to accept people without passing judgment.