The serious drawbacks brought by the government's excessive control system mainly include: (1) the controlled enterprises are inefficient or inefficient; (2) Hinder the emergence and application of technological progress; (3) Control costs and related costs are increasing; (4) The excessive discretion of the regulatory authorities leads to the proliferation of "rent-seeking behavior"; (5) "Regulatory lag" does not adapt to the ever-changing market environment, resulting in losses for enterprises and consumers. So the answer to this question is ACD.