My participation has dropped a lot compared to when I only just joined. There is only so much us centric doomer content I can stomach, and Lemmy is so extremely political that it is impossible to just browse cat memes and have a good time. So I spend less time here I suppose.
In short, the authoritarianism happens because it requires a large amount of power to make the societal changes happen in the first place, which would then give rise to a generation that can maintain the system without overreach.
Now the problem obviously is that humans are corruptible, and very few people in the history of our species have ever been given totalitarian powers and not abused it for their own power and benefit.