What was the manifestation and what was the explanation for the drop in confidence in the communist

What was the manifestation and what was the explanation for the drop in confidence in the communist parties in the post-war period?

After the war, people got the opportunity to see how they live in other countries, what kind of order there is. Confidence in the party fell because for many years there was propaganda that things were bad in other countries. People saw democracy and wanted to establish it in the USSR. All these democratic impulses were suppressed by the Soviet government, Stalin sought to further tighten the regime. So he tried to keep his power.