Why are so many people getting chronic illnesses now?

I see so many people just like me and it hurts. And it’s genuinely scary. Why is this happening to so many of us? What the hell is in the air? And I’ve noticed a lot of us were pretty healthy as well, like I don’t smoke, drink, I eat pretty well I’d say, what went wrong? It’s so many people it’s actually terrifying. Yes it makes me feel less alone in my suffering but why the hell is it happening so much?!