What's the Elizabeth II florin doing there!
"disastrous election result"? We don't all think that! It's true that had TM won a predicted landslide, she could have pursued a Chequers-style solution to Brexit from the start without worrying too much about the Europhobic rabble in her party (Rees-Mogg, Fox, Gove, Johnson, Cash, etc) and got us a reasonable deal. Now it's anyone's game, anyone's guess.
As for 1945, Atlee's government helped shape what we know as modern Britain rather than the failing Empire mindset of the 1930s. Even Thatcher couldn't (or wouldn't) undo all of that. The British people shouldn't be insulted as 'stupid' for evicting Churchill, who was inspirational in the fight against Hitler, but who proved less than inspirational as a peacetime leader.