I was with my 2nd wife 25 years. We're still friends, both regard the partnership as a success overall, and share responsibility for how good it was and how it ended.
The institution isn't good or bad, it's just difficult, especially for young couples with children in such volatile and rapidly evolving times. Two adults is not enough IMO to form a stable structure, now that we no longer live in multi-generation households.
For older people whose responsibilities are simpler, a simple partnership may still be perfect. But I don't want to lose touch with younger generations, now that I've lived long enough to have what might be seen as wisdom, or at least perspective.