So happy for you!!!
It's the group of people. It can happen in schools, churches, workplaces... you get the wrong group of people together (or even just a certain blend of personality types who are great people in other situations)... and it's Lord of the Flies.
I moved every 2 years growing up... so this was reeeeeally apparent. Just from a kid perspective; some moves I would be one of the most popular kids, have tons of friends, their parents all rocked... and then the following move I'd be a 5th class citizen. My mum has been PTA president or an officer, and the PTA was rocking, and then next school it was a bunch of stuck up power hungry morons (to quote my mum).
As an adult, I've also moved quite often. Found the same thing to be true. In some places everything just GELS, and it's fun/ easy/ welcoming. In others it's like I (or anyone else on the outside) has leprosy. I actually feel pretty badly for my son, because every neighborhood we've lived in, he's been surrounded by great kids, teachers, etc... and THIS one? Oy vey. He's still a really popular kid ELSEWHERE. It's just our neighborhood and local schools (we homeschool, but most of his friends are awayschoolers) are just weird.
I call it the "sheeple effect". Birds of a feather really DO flock together. Great, interesting, fun people tend to hang around other great, interesting, fun people. Cold, snotty, dismissive people; ditto.
I've learned it has NOTHING to do with me, and everything to do with pure dumb luck.
It's one of the GREAT things about moving. I've met so many people who hate the school system (you find that in homeschool groups more than elsewhere), or who lose their faith/ come to hate a certain religion, etc. JUST BECAUSE they always stayed with the same group of people. When really, churches/ schools/ offices are like ice cream flavors. If you don't like one, try another, because even though it's the same SYSTEM, the people that make up that system are very different. When you've gone to 10 schools, and dozens of churches/temples/etc., you really get to see it's not you. That places are just different.