The Iron curtain was seen as the divide between Communism and Democracy, but most Western European countries were democratic. Spain and Portugal were Dictatorships till the 1970's and Greece was a dictatorship for about a decade round the 1960's and the 1970's but this was generally ignored and it was thought to be free Europe. In Germany the iron curtain actually took solid form as the Berlin Wall dividing Communist East Germany from democratic West Germany. The Iron Curtain was very short-lived, lasting for just over a generation (about 45 years) only.
Even in the early 21st Century European countries that used to be on the Communist side (particularly former USSR) of the Iron Curtain are less happy than countries that have been free and neutral since the 2nd World War (Sweden, Finland).
Note the sharp divide across the Baltic nations.