What we witness seems to be a lack of control due to a vicious feedback loop that eliminates dissenters and reasonable, moderate people from positions of power. The longer it stays active, the worse it becomes. In other authoritarian systems this is not so noticeable because their leaders act more rationally to begin with, although they tend to lose their grip on reality in the long run, too.
That's definitely going on. There's also something that I've heard called "reactionary centrism:" a feedback loop of people who think that truth lies in the middle between the two extremes, and also that assumes that no mainstream position in a political faction can itself be the "extreme." And that if they find that one political faction is doing something that seems extreme to them, that in the interests of fairness and centrism, they must start considering something that the other political faction does as equally extreme.
A lot of pundits that were center-left in past years fall into this trap, and normalize extremely right-wing positions these days because of it. They are stuck in an media and information environment of politics and, lacking many core values to guide them, they navigate to the middle of the media that they consume, assuming that the truth will be there in the middle just like it was in the past.