almond
No particular encounters, just this general attitude of being extremely self-absorbed. We were at Etnografiska muséet and sitting at the table next to the door that leads outside. Whenever someone opened that door there was a gust of wind that hit us right in the face. And people just kept opening that door and pondering whether it was warm enough to sit outside, oblivious to any draft ... Place is full of these people, who wander around the city thinking only of themselves. Not just the usual Swedish reluctance to engage but a really selfish attitude. ;)
I had a neighbour once with a better (a proper) story, albeit this was 20+ years ago - she was at Ikea in Sthlm to buy fabric for curtains. Found the kind she wanted, took it to the table and started measuring. This other woman comes up and says "oh, I wanted that fabric and that's the last roll!" my neighbour said "yes...? but I got here first, so..." And the woman says "But I was going to sew curtains!" as if that was the clincher so she should get the fabric.
This altercation does not surprise me for Stockholm. It wouldn't happen in Uppsala where I live, we'd grit our teeth and bear it. 
However, I've browsed Mumsnet long enough to see people complaining of the same shitty attitudes all around Europe. I've also encountered a fair few snotty people in Paris
but I understand this is a particularly Parisian trait?
I am shocked at the story above of the nurse's comments. I have friends and colleagues whose children are - despicable expression but l'll use it here anyway - "mixed race". AFAIK this is not something they've encountered, although my black friend was "randomly" stopped not that long ago when driving home (obvious racial profiling based on the vehicle he was driving). Sweden is def not immune to these attitudes and people can be very casually racist, defending indefensible words like "negro".
I have a Swedish friend who actually lives in France and has "mixed race" children and she would love to move back home for various reasons. (incidentally my colleague i mentioned has a French partner!)
It's tough if you're miserable. And you can't very well move around the whole country to find a nice place to live. If you hate the winters you do, my BIL couldn't wait to move away from Sweden and back home, he hated the snow with a passion. It seems very selfish of your husband to not consider it. It can be that he genuinely feels that Sweden is better to have kids in, with our generous parental leave and so on?