I think the trouble is that for many women it is a combination of their first stay in hospital and an overly romanticised expected birth experience. When compared to other wards, where the people are ill (most postnatal women are not ill) and visitors are limited (most postnatal women have DPs to help during the day), then the post natal ward is a lot more hearts and flowers and hand hold-y than the rest of the hospital.
Whilst I was in the postnatal ward, a close friend was in a packed oncology inpatient ward elsewhere in the same hospital. The oncology ward was significantly more "hearts and flowers"
than the postnatal ward, if that's what you want to call it.
Like other posters, I heard other women weeping constantly in the postnatal ward (not just me); and out of many people who I knew and have since met who had babies at the same hospital, the only ones who told me they had good postnatal care were the ones who delivered in the MLU and didn't go to the postnatal ward at all. It's known for being awful (it's not St Thomas's by the way) - one woman I met afterwards told me her postnatal care in the same ward was so bad, including a near-miss medical error by midwives, that her husband started documenting it with detailed notes (he's a lawyer), on the expectation that they would have to sue - it was only when they saw him doing that that the care became even acceptable. Another woman I met at a party, also a lawyer, told me that not only had she been left in the same PN ward without a single obs for 24hrs after a section, her own firm had dealt with several lawsuits against the hospital for errors in delivery and PN care.
Obviously that's all anecdotal too. But pretty much everyone in this town gives birth there and I've only heard bad stories about the PN ward. So for me, no, OP, I don't think the vast majority of women get fantastic postnatal care. I think under the NHS lots get good, sometimes excellent, clinical care at the point of labour and delivery. Babies are looked after well. I think postnatal care for the woman is pretty awful in this country, actually, and has a huge amount to do with our very high rates of PND.
Saying that hardly any women die any more so the care must therefore be good, is a bit like saying that not that many people kill themselves, really, so NHS mental health services must be just peachy. We all know they aren't. Trauma and poor treatment matters, and yes it is a feminist issue.