I've never used that phrase - but overall I've really enjoyed being a parent .
It was hard work and there are bad days but overall they are one of the big things I've done that's made me the happeist.
I wouldn't advocate it for eveyone - and it's always a gamble and one you can't undo - but I've enjoyed it.
There's research to suggest that parents are unhappier than non parents but a lot of that research I've seen been done in USA - and apparently they are often unhappier as parents.
https://time.com/collection/guide-to-happiness/4370344/parents-happiness-children-study/
And yet, a new study of the life satisfaction of 22 Western countries has found that in some places, parents are happier than non-parents. A Council of Contemporary Families briefing paper, based on a longer peer-reviewed report to be published in September, argues that parental discontent is neither global nor inevitable. In some countries, humans with offspring actually report higher levels of well-being than those without. “Our results indicate that the parental “happiness penalty” varies substantially from country to country,” the researchers write. “In fact, in some countries, such as Norway and Hungary, parents are actually happier than non-parents.” That is also true, on average, of parents in such places as Portugal, Finland, Sweden and Spain.
Also seen research that suggest parent happiness levels depend on when measured - there are dips at some points but if the kids leave home parents are often happier than non parents - less so if they boomeranging back - which in UK due to high rents and houses is happening more.
It's a big thing harder in recent times for each generation I think in UK.
I think it's perfectly possible to have a good happy life without kids but I don't belive those who do have them all regret them - though a small minority possibly will.