Earlier quoted context omitted.
The same is true of many different pairs of parties! It's been a long time since any winner had over 50% of the popular vote. 2024: 33% 2019: 43.6% 2017: 42.3% (Lab: 40%!) 2015: 36.9% 2010: 36.1% 2005: 35.2% 2001: 40.7% 1997: 43.2% 1992: 41.9% The last election where the winning party got over 50% of the popular vote was .. 1931.
Yes it's been undemocratic for a long time. The 2024 one was just particularly egregious.
It's a series of (balanced) regional votes for elected representatives from equal-sized constituencies who are supposed to be responsive to that region.
Suddenly this is a massive problem for tories because it's red-faced angry right-wingers on the losing side. Whenever it contributed significantly to a tory win, it has not been a problem.
If you look at what actually happened you will see that, repeatedly, right-wing candidates lost out on a constituency-by-constituency level because the Conservatives were largely incumbents who had built up enough very personal bad reputation to be booted out, or inexperienced first-time candidates who are very rarely elected anyway and were parachuted at the last minute into seats where grandees were retiring, and the Reform candidates were a gaggle of weirdos, randoms, odd-bods, extremists and idiots who were lining up to stand for election for a party that had such a thin platform it ultimately resolves to "oooh we don' t like them", where "them" varied a little region by region but usually meant foreigners.
(And, of course, they split part of the vote between them.)