In the previous life, the dissolution of the Soviet Union was, to a certain extent, due to the arrogance of the leadership in the later stages, especially the excessive psychological expectations of the populace created by propaganda regarding national development, leading to a difficult acceptance when the dream shattered.
Actually, the Soviet leadership was also in a quandary, being propped up by the low-grade opinion machine they themselves had created, and truthfully, even in its final stages, the domestic economic situation in the Soviet Union wasn't as dire as imagined. At least, compared to many countries in Asia, Africa, and Latin America, the Soviet Union, whose national system hadn't collapsed, was still far superior in various aspects domestically to other regions.
