I'm not sure where or by whom you you were told it's a fragile, prone-to-collapse form of government, but I wasn't. Communism has a stranglehold on the societies it spawns within because the elite keep it that way.

Show me a country that espouses true Communist principles and I'll show you ten successful Capitalist ones. Don't confuse corporatism with capitalism, the latter which is the free exchange of ideas and goods mutually beneficial to both parties in an open market.

The US's enemies keep Cuba on life support for one reason.

Work a day in the gulag for your pithy apple ration and you'll be begging to sit in an air conditioned office and choose from ten apple varieties at different prices at your local Corporate Grocer.