This is totally subjective. However, If I have to sum up marriage in one word, it’ll be this:
Marriage amplifies everything, both good and bad, multiple times. For every fancy moment you saw on your social media feed about marriage, kids, and family life, there are equal struggle (which many of them might be not pretty) behind it.
This might vary from person to person, but personally my single compared to marriage life is pretty much looks like this:
So the next time your skeptics friend who tend to bash most things about marriage say anything about marriage, take them with a grain of salt. There are actually equal extreme goodness in them. And the next time your pro-marriage-as-soon-as-possible-religious friend promote marriage to the extreme, take them with a grain of salt as well. There are equal struggle (and pain) on everything they promote as well.
Basically, take everything with a grain of salt.