It is actually an issue and in some sense I think there is a case to be made for a timezone split between northern Europe and southern Europe. So e.g. putting Scandinavia in UTC +1 and Spain and Italy in UTC +2. Where we draw the line is tricky, because I doubt that nether France or Germany would want two timezones.
There absolutely is. The north is getting very little sun in the winter (about 6 hours) and very much in the summer (about 19 hours), while the south has a lot less variance (10 vs 14 hrs for south of Spain.) My argument would be that the south needs DST more than the north.
I understood that and I genuinely sympathise with the daylight-related syndromes people up there in the North have to deal with, but you also have to understand that further South we also become depressed if the Sun comes down too early, especially in the summer. So from an utility and democracy point of view the wellbeing of the majority (and the vote of said majority) should take prevalence over the wellbeing of the minority.
Or you know, you could just put countries in different timezones. Apparently that's easier than convincing people that the workday doesn't need to start at 8:00 (or 10:00 in the case of many in Southern Europe).