What were the consequences of the era of stagnation for Soviet society?

The consequences were as follows:

The slowdown in economic growth, it became more quantitative rather than qualitative, the gap in the standard of living with the capitalist countries increased, the achievements of scientific and technological revolution began to be introduced more slowly in the USSR.
Demography. Mortality increased, infant mortality decreased, but slowly, the gap with developed countries increased, life expectancy stopped growing in 1964-1984 and even decreased.
Aging leadership. The old people were less intelligent and lagged behind life.
Failures in foreign policy, despite aid to Egypt, he changed foreign policy to a pro-American course in the 1970s, and the same with Somalia in the late 1970s.
Disappointment of the population in ideology, the growth of the movement of dissidents, the emergence of the first rock bands with political themes in their lyrics.
The rise in drunkenness and the rate of homicide and suicide.