I live in the Heartland, and know most of my neighbors and don't like them. Intolerant snobs, for the most part. The only ones I can stand are from "out of town." There is one exception. My next door neighbors are born and raised Hoosiers, and they are amazing people. Older couple without a snobby bone in their body, even though they have every reason to be so. My only criticizm of them is they do tend to follow the local custom of name dropping. Other than that, they are wonderful and take the sting out of this particular neighborhood. I do believe it is mostly a neighborhood thing, not a regional thing. I've lived in some very stand-offish communities, some ho-hum, and some amazingly supportive and friendly places. I try not to pidgeonhole a region because I choose poorly when purchasing a house. It is pretty much a roll of the dice, and I feel blessed when I have great neighbors, and like I'll just have to bear my "we have nothing in common don't you dare look your nose down on me you used to be farmer who doesn't see your own value besides the brand of car you drive, and think you are all that" neighbors.
Sorry to hear you have been having such a hard time transitioning to your new location. I'd love to say it gets better, but if you don't try to find your place there, it will be difficult, and you may just have to grin and bear it until something else comes along. I'm not implying it is anything you are or aren't doing. In my situation, I am trying desperately
NOT to be assimilated, and know I'm never going to really ever call this place home. But I know why I'm here, I have my lovely DH, DD, and DS with me. We have a nice house, the kids are doing great in school, and DH has a good job. We travel often (mostly because we don't like it here

), and try to get, of all places (I know you'll roll yor eyes at this

) The NE as often as possible!

The funny part of this bit with my present location, is it is only 168 miles frome my driveway here, to my old driveway in Michigan, but it feel like I'm living on another planet.
Good luck and get out there and look for things that interest you in that area. I'm sure you will find something to substitute for the lack of community that you were so accustomed to.
Keep the Faith!
Tracy