Well, I can't argue with your selection of facts, but I don't accept the inference.Amazing stats old boy when you look into them.
Surprised to see that despite defeating Hitler and winning the battle for democracy less than 75% of the electorate voted In the subsequent GE that voted Churchill out.
And the first one I can really remember, in 1974 when Heath went to the country over the Unions asking “Who governs Britain?”, nearly 80% turnout, a figure not surpassed in 50 years, he won the popular vote, but under FPTP voting system lost his parliamentary majority.
Clearly our voting system has been flawed for decades.
I have always considered that the electorate elects governments it deserves.
They only way to change the outcome is to assign all the seats in proportion to total votes cast, using a national list, with voters ranking candidates in order of preference. And if we did that, more than half the electorate will still be pissed off because their favourite didn't win.
And note that nobody ever voted for a coalition in the UK. It isn't on the ballot. Coalitions exist around Europe basically because they do, and at the end of the day electorates around the world tend to either accept whatever system they get, or rebel (as Egypt did when the election didn't give them what they wanted).
As Marvin the Paranoid Android might have said: don't talk to me about the electorate. Here I am, an opinion the size of a planet (etc. etc.).
The English are phlegmatic. Evidence? Well, you think the system doesn't work and yet (as far as I am aware) you are doing absolutely nothing about it other than occasionally grumping on a football forum.
I hope you are well and cheerful, matey. It is what it is