You missed the step where the public institution gets broken up into many smaller private competitors who are then incentivized to provide better/cheaper servic

You missed the step where the public institution gets broken up into many smaller private competitors who are then incentivized to provide better/cheaper service to gain marketshare. The Soviet Union missed that step too when it collapsed. Monopolies are trouble whether private or public. Unfortunately, energy markets have a tendency to be dominated by local monopolies of both the public and private variety.