I know exactly what you mean! I've felt that way for so many years. I remember when I was in my early twenties working in Downtown Atlanta(miserable fucking place) was probably when it first occurred to me. I grew up in an area that was transitioning from country to suburbs, so I was always around nature growing up. Thanks to the world of "entertainment", the city seemed so alluring.
Anyway, I realized, working Downtown, that maybe all the concrete and metal smothers Mother Nature, blocking the positive energy from mankind. There are other parts of Atlanta that have a lot of trees lining the streets, parks and whatnot...but it is still the city. Bars, shops, cars, noise pollution, air pollution, advertisements,
distractions....
Before I moved back to my hometown I was so miserable. There is practically nothing to do in the city that
doesn't require money. So, I spent very little time in nature. Working, sleeping, vegging out in front of the t.v.- and when I felt like "getting out", it would just be to go get a coffee at the bookstore.

I remember driving through shitty, city traffic and the song Baker's Street came on. I think it's actually about a gay man's struggles(read that somewhere) but the lyrics have stuck with me ever since.
This city desert makes you feel so cold
It's got so many people but it's got no soul
And it's taken you so long to find out you were wrong
When you thought it held everything
Around 30, I had a nervous breakdown and moved back home to my parents house. A few years later, I was fortunate enough to move into a house in the woods. I was actually almost devastated by the fact that I wouldn't have cable!

I thought, "I'll be so bored, all alone with nothing to watch!"

Best thing that ever happened to me! I found serenity! Suddenly I was reconnected to what I had loved my whole life! Trees, birds, insects, water, dirt! I love it all! I believe it could be the answer to severe depression.
Actually, I believe that my immersion in nature was a sort of detox. Synchronicities became more frequent and curious; ultimately leading me to what the conspiracy movement likes to call "awakening". I do not claim to be "enlightened" by any means but I had a "Tower" moment(if you are familiar with tarot; if not:https://www.tarotteachings.com/tower-tarot-card-meanings.html).

Oops, kinda started to ramble! I tend to do that sometimes...
Anyway, Irre, get as much nature time as possible! It's good for what ails you(as my Gramps would say

)!