Other posters are tackling the more serious aspects to your post, but:
Going from childfree life to trying to look after a refluxy baby who cried a lot and didn't sleep, hated the pram, screamed through every baby class, screamed through every car journey and only slept on me (so no using naptime to relax or do laundry or go to the loo, and no lovely walks by the sea to clear the head as planned) was far from "freedom to potter around". I've never felt less free, more constrained, more anxious, more exhausted, less like myself.
My second baby was much easier, and I can more relate to the freedom and pottering aspect, but by then it was lockdown and I lost a parent so that leave wasn't the easiest thing either.
Comments like "you wonder why they have children in the first place if spending time at home with them is so hellish" are just as misogynistic as "maternity leave is a holiday". Looking after a baby is hard work, and both comments hugely disrespect that.
My finding it difficult to look after my baby doesn't make me an inferior mother. My still doing that work, giving her unconditional love and literally all I could possibly give any one person is what makes me a good mother.
If one of your children ever struggles with being a parent I hope you're more thoughtful in your response to them than the utter crap you and others have posted here.