Can you name a country with a successful implementation of communism? Successful for me means the people are happy and implementation means they actually stuc

Can you name a country with a successful implementation of communism? Successful for me means the people are happy and implementation means they actually stuck to the ideals of communism and haven’t slid capitalism in. Here’s a happy map for the world. https://www.mappr.co/thematic-maps/world-happiness/ https://www.mappr.co/thematic-maps/world-happiness/