If you're concerned that people are becoming untethered from reality, I'm with you. I completely share the concern. As far as I can tell it's not restricted to one side. In fact, if anything it might be more prevalent and a more serious problem nowadays for the far Left. I will explain my reasoning:
In 1984 -- since you brought it up -- there are at least two mechanisms by which the Party controls information: the memory hole, and forcing people to say things that are not true (e.g. 2 + 2 = 5) until they internalize and believe it. Only one side has engaged both of these mechanisms, and it's not the Right.
Memory holing requires institutional power to actually pull off. I claim you can't even do it without already having a lot of control. The Party would not have been able to do it if they didn't own the Ministry of Truth. Today, the Left controls almost all of the institutions, and I claim they are the only ones even in a position where they could pull it off. They control academia, the media, "big tech", most large corporations, and the government (not only the elected government at the moment, but for decades now they also control the permanent state). That's a lot of institutional control. Furthermore I claim that not only do they have the potential to memory hole, but they actually do. There's a recent example where WaPo is flatly denying doxing Libs Of Tiktok even though we see this is false thanks to the Wayback machine; but they're still trying to memory hole anyway. There's a pattern of reporting false news and never retracting or acknowledging in any way the false information, even when the truth comes to light.
The next mechanism, forcing people to say things that are not true or even just things they don't believe, is a phenomenon exclusive to the modern Left today. There's no "live and let live". They get very angry and will retaliate and try to ruin your life if you won't repeat fundamental lies akin to 2 + 2 = 5. Basic truths such as "men cannot get pregnant" must be denied. They bully corporations to go along with the lies, further cementing their institutional control. The Right (as a generality) can be wrong and even lie, but they don't try to force other people to repeat the lie as the Left does. If they believe an untruth that, for example, climate change isn't real, at least there's no crusade to force the other side to submit to the idea.
So yes, I am concerned that people are becoming increasingly untethered from reality. But if the book 1984 has any valuable insight into why, I think it points mostly to the Left as the source of the insanity.