I was on my knees with my first baby and an incredibly unsupportive husband, at 21.
My house had a damp issue and clothes just wouldn't dry. I bled for 3 months post birth and had a very pukey baby. There was so much washing it's still burnt into my memory, despite over a decade passing.
My lovely grandad arrived one day, loved the baby for several hours while I slept and when I woke up, had packed every piece of that washing into his car. It filled 2 bin bags. He returned it the next day, clean, ironed and folded. Put everything back away for me and sent me back to bed and has never mentioned it again. He was the only person in a family of 2 great grandparents, 4 step/grandparents, 9 aunts and uncles who would look after my children for longer than 5 minutes while I had a wee. After that, he helped in every way he could see while I got used to having a child. I needed that desperately.
The lack of support is real. I would have broken without my amazing grandad. I certainly got no support from my husband. He was the best parent to me as a child; he has stood like a protective giant at every turn possible. Everyone should have someone like him.
I don't think people have to offer this sort of support, though I always have since I was in that position. Some kind of support is needed though and books and articles should really stop saying people will be fighting to offer it. They won't. It's a bloody nasty shock, when no one, not even the baby's dad will help you with anything practical, having been told otherwise at every turn before birth.
(Yes, I am projecting. Millions of women have been in the same position though.)