Why did Socrates criticize Athens' democracy?

Socrates’ analysis of the hatred he has incurred is one part of a larger theme that he dwells on throughout his speech. Athens is a democracy, a city in which the many are the dominant power in politics, and it can therefore be expected to have all the vices of the many. Because most people hate to be tested in argument, they will always take action of some sort against those who provoke them with questions. But that is not the only accusation Socrates brings forward against his city and its politics. He tells his democratic audience that he was right to have withdrawn from political life, because a good person who fights forjustice in a democracy will be killed. In his cross-examination of Meletus, he insists that only a few people can acquire the knowledge necessary for improving the young of any species, and that the many will inevitably do a poor job. He criticizes the Assembly for its illegal actions and the Athenian courts for the ease with which matters of justice are distorted by emotional pleading. Socrates implies that the very nature of democracy makes it a corrupt political system. Bitter experience has taught him that most people rest content with a superficial understanding of the most urgent human questions. When they are given great power, their shallowness inevitably leads to injustice.

The Charge Of Impiety