I kind of understand this. My daughter was privately educated, in a very very affluent area, and some of the kids houses were absolutely stunning. We lived in a bog standard house.
Only a couple of mums made me feel judged, the rest were lovely, and I just assumed those couple of mums were a pair of bitches, so it didn't bother me. But I did sometimes wonder what the rest thought. Especially as I openly gaped some times when I went into their homes.
We could have moved up the property ladder, but didn't, we stayed put, and moved abroad for a few years, when we came back we moved into a much larger property.
We then held a party for our daughter in her last year of school, and that's when I felt judged. Same school so some of the same kids, and some of the same parents.
The one original bitchy mum openly commented "your house is beautiful" but it was done with quizzical stares, like she couldn't understand it. And she suddenly wanted to be by friend, to which I was less than interested. The other parents also commented, but it was the less affluent ones who I had not known before, who made me feel judged oddly enough. Like they were assuming I was something I was not, some posh bird in a big house.
So for me, the lesson I learned was where ever you live, someone is going to judge, there is nothing that can be done about it. The kids don't care, it's the adults, so really you may as well do your damndest to not think about it. Because with some folks you can't win either way, you can't change it, and it's more about them than it is about you