Reasons for the defeat of the Red Army?

If we talk about the years of World War II, then the reasons for the defeats in 1941 were the lack of an experienced command staff. Many generals and officers were accused of conspiracies against Stalin and the USSR and were shot. Those who were a little more fortunate died slowly in the camps. The Germans used the “blitzkrieg” tactics. For such a conduct of the war, the troops of the USSR were clearly not ready. The officers were afraid to take responsibility because they saw what the repressive apparatus had done to their colleagues. In addition, the troops of the USSR were inferior in the quality of weapons, although in terms of the number of personnel and weapons they generally surpassed the invader. Huge losses in the first year of the war called into question the existence of the USSR and its army.