The Soviet people probably weren't ready for too much freedom and the system couldn't handle the level of open criticism that Glasnost allowed.
The situation might have been sort of like how the US is a fragile empire that would crack if ordinary people knew the full truth about how it operates. Most people still have some belief in the system and undoing that belief could lead to the end of the system.
This might be the ultimate reason why Trump and his entourage have to act like "deep staters" and defend the system and protect the dollar. The consequences of appeasing angry sections of the public, that demand openness, might be worse than the consequences of constant deception.
Americans might not be ready for too much freedom, unless they want to live like Russians in the 1990s when the dollar collapses and tens of millions of people suffer "deaths of despair."