History seems to remember Churchill as one of the greatest British prime Minsters who pulled the country together to fight alone against fascism, but was this the case? In the age of appeasement it didn't seem like much people wanted a war with Germany but Churchill. Did people support fighting Germany over Poland? Even after rationing, conscription and their streets getting bombed?
Is this why he wasn't re-elected after 1945? Did people support his government polices in both his terms? besides polices regarding WW2 what other polices did his government have?
He was not re-elected in 1945 for a couple of reasons. Please remember that Churchill was Prime Minister because he could command a majority in the house of commons and no other reason.
The British system tends not to like Prime Ministers who are their for their own personal popularity alone. The Conservatives based their entire campaign around Churchill and his charisma and did not really come up with a new manifesto. There has arguably been only one Prime Minister who kept office through popularity alone and it was Palmerston.
although he had led the country through the war people did not think that he was the right man to rebuild after the bombs stopped dropping. He probably would not have set up the NHS and nationalised industry. Labour by contrast was the party of social reform and was ambitious in that regard.
The Conservatives (not churchill himself) were blamed for the depression and appeasement in the 1930s and his own personal popularity remained high.