When I was younger I used to assume that most marriages or long-term relationships were beneficial for the people involved, giving them emotional and practical support, love and (ideally) good sex. I thought that negative relationships were the exception.
Looking around me now, talking to friends and acquaintances, and from my own personal experience, it definitely seems to be the other way round, particularly from the female perspective but also for many men.
(I am getting divorced at the moment so am probably biased to some degree but we've managed to stay civilised and consciously I mainly feel relief that it's over rather than any great enmity.)
I can genuinely only think of a handful of long-term relationships where both partners seem to be happier and emotionally better off than they would be single. Only my own parents and two or three other couples obviously have a "happy marriage" in which they appear to enjoy one another's company and support each other to the extent you'd expect.
Every other relationship I can think of seems to be dysfunctional and misery-generating at best and riddled with physical or emotional abuse at worst.
I understand that some people stay together "for the sake of the children". Thinking of some of my friends' parents who did this, they were amongst the most miserable families I've encountered and their now-adult kids certainly don't thank them for it. This argument doesn't wash with me.
The chances of having a positive, constructive relationship with another adult seem so slim that atm I don't know why anyone bothers.
Is this really the truth?