With the single exception of correctly predicting and warning against the rise of the Nazis in his political career Churchill was wrong about every single major issue of British foreign and domestic policy.
He was wrong on India on Ireland on the abdication on the Gold Standard, during the First World War he was wrong on the importance of winning on the western front and defeating the Germans in France (although in fairness he was wrong on that for the right reasons).
So with such a track record it is fairly understandable for him to be ignored when he finally got it right.
During the Second World War as First Lord of the Admiralty he oversaw one of the single most calamitous failures of the Royal Navy’s history when the Germans sailed up through the North Sea, a British lake, and seized Norway. He only escaped blame for that because of his previous record of calling for rearmament and because of the disaster that immediately took place in France.
Throughout the Second World War he oversaw catastrophic errors that ultimately saw the British Empire dissolved and what remained of British wealth and territory handed over lock, stock and barrel to the US.
So no doubt we can all beat our chests about how we are Churchills roaring out our defiance to the world but in many ways he was a disaster for Britain and I am one of his admirers by the way, but I prefer my heroes warts and all, not plaster saints.
It's helpful to have the 20/20 hindsight, of course! and there's times when a little roaring might do some good?!
Ha!