What reason did plato give to describe the problem with a government led by a tyrant?

Plato described the problem with a government led by a tyrant by pointing out that tyrant rule has problems such as the show and use of force in ruling the people and in commanding loyalty.

Tyrant is illegitimate because he uses force to get and keep political power. Tyranny is usually run by 1 individual who has lots of powers without any checks and balances.

He is usually wicked and cruel. A tyrants use of force in ruling help in the subjection of people to slavery and harsh conditions.