I don't understand how monopoly markets compete with each other?

Full employment does not foreshadow economic growth, if anything does it is the competition of a free market.

Basically, even though everyone has an income, it is not necessarily a growing income over time, reducing economic growth which takes into consideration ^RIperCapita / ^Time.

Even though most individuals have an income, the economy does not grow as fast as say in a free market, reducing the HDI index (therefore economic growth), which takes into account real income per capita.

This is the major repetitive cycle that a free market grows and develops economically from.

In a free/mixed market there is a competitive price system governed by the concept of the "invisible hand" that causes goods to be produced cost-efficiently, whereas in a planned economy, there is no definite price system in place causing goods to be sold at higher prices with no real regard to efficiency.

In Free/mixed markets firms look to make the highest profits and therefore produce at maximum efficiency. But oftentimes in this pursuit they can cause pollution, damage the environment and abuse natural resources. In a planned economy, the government could intervene and prevent this.

Governments can prevent the oversupply of demerit goods and the under-provision of merit goods