Well summer never made me want to kill myself so I tend to prefer it. Severe seasonal affective disorder is interesting.
That said these days I have ways of dealing with it. Turns out running during the winter days is kinda neat because you end up getting endorphins and UV. I also have one of those SAD lamps and they truly work for me. Nowadays I like winter a lot more - especially cozy stuff like knitting and tea.
I do think that the world's increasing waistlines affect people's attitude about summer. I know that the bigger you are, the more miserable the heat can feel. Plus wearing revealing clothes isn't fun for everyone, especially with things like chub rub. On the flip side, being skinny makes you pretty cold so the winter can be miserable. I know that no amount of layers would help the ache in my bones when I was underweight.
This is why autumn is bae. Hot enough to be outside, cold enough to not sweat, pretty colours and harvest activities, Halloween... Autumn wins. Close second is spring, which I hear is fabulous in many places, but in Canada is mostly just freezing winter temperatures, one week of trees blooming, and then just 30 C temperatures after that.
That's your experience. No matter how well I dress, I can't stop my bones from aching in the cold. On the flip side, I'm typically comfortable in the heat, even in 38 Celsius temps. I obviously have an upper limit of like 40-45C, but so do most humans.
Likewise it's not really safe to chill outside in -40 to -50C for most humans either. At that point you're getting frostbite through the wool underlayers, and the exposed skin will literally sting.
We are in this thread discussing our experiences, so, valid all around. For most folks who don't have bone ache(that sucks), effective layering provides an "out" from the cold. Once you are in shorts and a shirt, there's nothing more you can do to be more comfortable in the heat (aside from an alternate, bedouin strategy) but that's not really relevant in western countries. Maybe it will be soon.
I think we can both agree heat plus humidity is the absolute worst. Heat on its own is certainly the lesser evil