This.
People with genuine SAD I don't include but most people who claim to have it, don't.
I'm always a bit bewildered by people who live in the UK finding the climate surprising or problematic.
I'm in my 40s. We sometimes have snow in March and also, some unseasonably hot days where you could get sun burn.
We often have lovely warm Spring as in days in April like the 2020 covid lockdown year. This year has been wetter.
We often have nice sunny spring/early summer which changes to very rainy once the schools end for summer.
Some summers are scorching for a few days or weeks.
Most Autumns are mild and damp
Most winters are mild and damp, we had a couple of winters almost over 10 years ago with a lot of snow for most if not all of England.
It's pretty much always been this way. Mostly wet and mild. That's our climate.
But I think like the clocks going forward or back where people express surprise every single year about how dark or light it is at X time of the day, people forget that's just how it is and always has been.