Just a guess that most married people are unhappily married.
You have an obsession with marriage. If you don't want to get married, just don't get married.
But where is the point to be NOT married and NOT wanting to get married and constantly saying how shitty it is? If you had 3 divorces on your count, i would say ok, but like this?
The best thing is that i would say you are really deep inside of you wishing for a nice woman to support you and comfort you, a woman you can rely on that would be by your side like only a wife can be.
Being married definitly makes a difference, and although i would agree with you that many people are unhappily married i wuold say that marriage makes a great relationship even better.
Btw, i think that most of the people are in unhappy relationships, that's because their ego is too big to really be close to someone.