Causes of bankruptcy of small and medium enterprises in 2018

In the period 2017-2018, Russia experienced a decline in the financial and economic markets. This was due to a large number of reasons, including political conflicts, which gave rise to additional economic sanctions, which led to a new round of recession. As a result, small businesses suffered the most. And although now a large number of state support programs for small businesses have been developed, the bankruptcy rate of such enterprises is still not decreasing. What are the reasons for the weak development of small and medium enterprises in Russia?