Day and night tend to blur into one with a new baby and I haven't read anyone say they don't feel happy having other people's partners around during the day
Mine said exactly that. I left hospital when I really needed to stay in because I couldn't face another day on the same ward as the partner of the woman in the bed opposite mine.
I would have felt the same way about a female partner who behaved in the same way.
And having my own 'lovely' DH with me probably wouldn't have made me feel any better. I'd have been worried that he might be the next person this man turned on, worried DH might have felt the need to speak up or try to help when this bloke kicked off at the staff, worried that even if my DH sat back in silence he might catch the eye of someone who felt a postnatal ward was a good place to re-enact fight club.
I wouldn't have wanted a woman behaving that way either.
He was extreme but I found the other patients visitors hard work. Constantly squeezing by my bed to get to the sink, messing about with the curtains, talking on phones, scraping chairs about, coming to and fro all the time passed my bed, fetching stuff and pushing by my bed all the time because they didn't want to open the curtains around the bed they were visiting, talking loudly, bored older siblings of the new baby playing on the floor, running around, wanting the TV on even though they were the headphone sort so they had them turned up as loud as possible so they could all listen to a dangling headset rather than wear it.
So yes, I did find it hard to have other people's visitors there in the day for so long. It made it impossible to get any peace, any sleep or feel comfortable while being examined or breast feeding. They were even able to hear me discussing things with the midwives, including the deaths of my other babies.
Some patients might be awful, might be violent, might steal or swear or rant, but at least they are patients and they have to be there. Non-patients wandering about and taking up beds and chairs and toilets and bathrooms as well would be worse in my opinion, even if just because they could be chatting half the night or carrying on the to and fro that went on all day.