I grew up in the USSR, and in the kindergarten, our teacher actually tried to convince us that the correct 5 year old kid's answer to the question, "which person do you love the most?" ought to be Lenin, and not e.g. "mom".
That said, in practice, the quality of indoctrination was extremely variable for the same reason why it was variable for everything else - most people weren't really buying into it themselves, and so even if they were in a position where they were expected to indoctrinate, they did the bare minimum that was demanded of them, which usually wasn't very convincing. I didn't get to witness it as an adult, but according to my mother, by the time you were old enough for Komsomol, very few still had their rose-tinted glasses on.
That said, in practice, the quality of indoctrination was extremely variable for the same reason why it was variable for everything else - most people weren't really buying into it themselves, and so even if they were in a position where they were expected to indoctrinate, they did the bare minimum that was demanded of them, which usually wasn't very convincing. I didn't get to witness it as an adult, but according to my mother, by the time you were old enough for Komsomol, very few still had their rose-tinted glasses on.