They had one job for life, the state made sure. They had apartment or house, the state made sure (if you were young family expecting child, they would just give you one). The wages and pensions were enough to live on, the state made sure.
In their eyes, there were a lot less existential threats (like losing a job or the rent getting too high you lose place to live) than under the new regime, life was "fair", no fancy enterpreneurs making millions while working people struggle.
Jumping to a world where nothing is certain and you're two bad months from homelessness after a lifetime of working was quite a shock for them. The message (however not all that real) of the old system was "we're all in this together" and the new one was "everyone for themselves, no caring about others" especially in the wild years after revolution. Some people are still sad about that.
(They also turn to fascist and populist politicians now as a replacement which isn't great.)