Chamberlain may have meant well, but his policy was foolish, and weak. He may have bought time, but for whom? Hitler was heading for a military conflict with the West, and as late as 1938, Britain, France and the still-independent Poles could have stopped Germany in her tracks. That would have been the end of the Third Reich.
Churchill was human, of course, and so, made mistakes. But he was a keener judge of character and international events than most in British politics in the 30's.
Who would you rather have a drink with? Churchill would certainly be more interesting company.