Apparently this post is not for me, as someone who enjoys living in the countryside. I respect your experience, I think it's very real and there are definitely significant challenges that city-people underestimate.

Now, despite being uninvited, I will actively push back so many of your ideas - I honestly think all of these accusations are not applicable in most rural places. Now it's possible you're in a shit area with genuinely shit people, and shit I really empathise if so. But forgive me when I say this sounds likely to be in meaningful part because you're living in the country with a city-dweller attitude and perspective, and that if you change your approach you might get more of what you want out of it.

I also say all this is a non-USAian so maybe it's completely different there. But of what I have seen I don't think it is entirely so. The working out part clearly is, however, as where I live there are legally enforced public footpaths and locally owned fields/forests all over the show in every direction, no shortage of running routes. I feel for you if there's a lack of that.

• That your neighbours are anti-social / you're isolated. Again, this will depend on your neighbours at the end of the day. My experience of the country is that I am in more of a community that looks out for each other than I have ever known to exist in a city. The difference is I had to make an effort to go out of my way to meet these people, say hi, bring a couple bits of homegrown veg or foraged fruit. And that people are less used to dealing with a diversity of people, so you typically need to be a bit more patient and understanding with where they're coming from. But once you are, you make friends and neighbours and reliable community members for life.
• That organising is impossible. Closely related to the above. Obviously it'll be impossible to easily get together a huge communist protest organised or whatever. But it's definitely possible to have productive movements. In a city you can raise a banner and you'll find people that come to it. In a village you need to engage people on an individual level. My tiny 100-person village has buying groups, free community food larders, about 50 people from here and neighbouring villages go and cause a nuisance at local towns in deliberate pro-Palestinian protest. One neighbouring village came together to protect a migrant resident from being deported by pigs. Organising happens regularly, but it's only a product of healthy and active community activity.
• That it's unsafe to play outside. This really does feel your most city-dweller-esque issue, but to live in the country you really do need a bit more of a "be smart about it" attitude rather than a "don't do anything that could ever potentially be unsafe" attitude. Nature is lovely and 99% of the time will be no trouble whatsoever. Be aware of rattlesnakes, but be smart about them and you'll be fine. FWIW most rural people feel the same about busy roads and unsafe neighbourhoods in cities.
• Being able to go buy stuff at a moment's notice. Certainly a truething, but again such a city-dweller attitude. Is immediate ability to buy anything you want necessarily a good thing? You don't have cumin? Then time to change tack and change the thing you're trying to do. It's a very city-attitude to consider that some meaningful issue. There is some flow-going that must be embraced.
• That you need to go travel for your regular haircut. To be honest I've never known a rural area that didn't have a very local hairdresser, but you might need to be 'in the know'. That shit might not be on Facebook or whatever. Plus is this really necessary? Just book it next time you're going somewhere if you need.

With all that pushback in mind, I do empathise with your issues. It's a shame you've fallen into these (fairly common) pittraps without realising them ahead of time. I say all this with two things in mind:

• That people who do consider the countryside don't get suckered into thinking it's inevitably an isolating and horrible way of living. I honestly do love it and despite having lived in a city, I cannot stand it, I really couldn't live another way. Rural areas have the nicest, most accomodating people I know - and it engenders that attitude because we gotta enjoy each other, there isn't anyone else around! This said, areas will differ, I'm sure there are plenty shit'uns.
• That I obviously hope your life improves, one way or another. But that I think there are some minor adjustments to your perspective and approach that might help alleviate some of your issues.

I'm not a farmer, but you still couldn't convince me to live in a city or sizeable town by ruddy gunpoint. Just shoot me.