In short simple sentences, he was never appeased. He thought the allies were fools to try appeasement. There is a famous picture after the fall Czechoslovakia I think, where his hands are at his sides and he shrugged his shoulders wondering what he could do next.
Chamberlain, to be a little sympathetic, could not believe that England had the fiber or the equipment or the manpower to fight again so soon after WWI. He had a point, but Churchill saw that there was no choice. Poland was just the last straw. A bully is never appeased by appeasement.