I used to think this, but my brother pointed out that there was no peace party in the UK at the time. Churchill may have been a good/competent war leader (I actually think his obsession with the "soft underbelly of Europe" was idiocy but that's, like, my opinion) but I think it's at best hagiography to say that Britain "needed" him.
If Churchill hadn't become leader the most likely candidate to become PM was Halifax. Halifax was a decent man who despised the Fascists but didn't believe Britain could fight on after the fall of France and favoured making peace.
I think you're right though that as a strategist he was a handicap. He was obsessed with bringing Turkey into the war and the Meditteranean and preserving the Empire was as important to him as fighting the Germans.
Not only after the war
A long time ago I bought for my father as birthday present the "memoires" written by Churchill. He liked history, and WW2 was during his youth.
When I gave it to my father, my mother snapped: "he was not a good man... not everything he will tell in the book will be true".
Churchill is said to have remarked on our Queen Wilhelmina: "the only man" in your government.
No wonder if you know that Queen Wilhelmina was before WW2 very much believing in a new world order where weak politicians had to be reigned in by strong man. They both were not that far away from fascist convictions.
For herself that came close to a divine absolute monarchy. In London she had her chance, because "she" was the hope of her poor occupied people, surrounding herself with yes-nodders and visits from Dutch resistance people who crossed the North Sea, not with those rambling (chosen) ministers around her. After the war she resigned in 1948 as a disappointed person, because democracy was stronger.
One of the Churchill operations was to wage a sabotage war in the Netherlands. A selected group (50 or so) of those Dutch resistance people, that all had their cup of tea with the Queen, were send back during 1942-1944 in small groups to the Nertherlands after a sabotage training in the UK. But were all caught immediately by the Germans when they parachuted down, because the Germans were informed. The Germans very proud that their counter-intelligence operation called Englandspiel worked so well.
The nasty thing here is that although the UK called it one of the biggest intelligence blunders they ever made, especially while they continued the operation after repeated warnings of the Dutch resistance that it was betrayed, there are a lot of indications that this operation was a counter-counter intelligence operation, where these resistance people needed to be sacrificed to feed the Germans with wrong information and extract info from intelligence feedback on that false info.
Nobody will probably ever find out what really happened.
But it left a bad taste in the Dutch resistance about the UK and Churchill, already during the war.
And nobody at that time had forgotten the UK war with the (former Dutch) Boers in South-Africa, the British concentration camps, which happened only 40-50 years earlier. Many childrens books about freemen Boers fighting guerilla against the evil British in SA. Churchill pictured in British press as a South African war hero.
Here some info on that Englandspiel
https://www.telegraph.co.uk/news/uk...gence-send-its-own-spies-to-their-deaths.html
I can believe thats possible. Theres a theory that he knew Coventry was to be bombed but did nothing so that the Germans wouldn't know we had cracked their codes.