1, the democratic politics in ancient Athens has two characteristics: people's sovereignty and rule by turns, which means that most citizens (especially adult men, women and slaves have no right) say that one thing is right, then it is right. There is a saying that "truth is often in the hands of a few people". Most people, especially in backward ancient Athens, their subjective views are not necessarily correct, which can be proved by their unanimous vote to sentence Socrates to death. If I remember correctly, Perikles, an outstanding democratic politician, was also deported by the ignorant Athens referendum.
2. Without a strong central government, every major event needs meetings, debates and votes, which greatly reduces administrative efficiency. In addition, the executive is a 500-member parliament. Unfortunately, in order to embody the so-called "democracy" of the Athenians, all the officials of this institution were decided by lot. Even if you are brilliant, you will never be in power, which also makes Athens appear that "orders are given by geniuses."