I was preparing to write another comment here, with these pictures from Iceland, thinking that you meant that you were "almost" happy when you were there.😂 Because throughout my life, except for the last few months that were quite painful at the same time, I have only been "really" happy when I have traveled, i.e. when I have been outside the country I am in at the moment. There's no such thing as "almost" happy then.
But you don't talk about that, anyway.😃
It's funny that I have problems, and huge ones at that, with the winter here. And you have problems with the summer, which I enjoy so much. And realizing that it will be gone very soon, I fall into a very gloomy mood. But there's also something that affects the psyche quite a bit, and then the body as well, and I think I've already mentioned this here - the constant talking and nagging about global warming and how dangerous it is outside now, when at the same time years ago it was even hotter. Temperatures aren't increasing. Just the talk about it. But even that is enough to make a person feel bad.
By the way, if you really feel that bad, why do you even live where you do?