No, You're the Crazy One
[President] Derangement Syndrome is a partisan malady which is diagnosed as a way of calling out opposing partisans over their dislike of any given presidential administration. Republicans, for instance, will call out critics of the Trump Administration as having "Trump Derangement Syndrome," but it would be considered sacrilegious for a Republican to describe, say, President Trump as having "Obama Derangement Syndrome," despite the fact that it appears that Barack Obama has been living rent-free in Donald Trump's head for quite some time now.
I find this interesting for what it says about America politics; namely that even though partisans are wont to speak of the current political moment in very high-stakes, existential terms, they appear to believe that its inappropriate for opposing partisans to do so, even when it seems rational to do so.
President Trump, for example, has taken a lot of steps to punish Democratic leaning areas for apparently nothing more than voting Democratic, and the current Republican redistricting push is explicitly designed to make it easier for Republicans to hold on to the House of Representatives, and thus continue to allow the President to implement policies that are intended to be punitive. So why wouldn't Democrats see that as a threat to themselves and their vision for the nation? Why wouldn't they see the Trump Administration as deliberately wrongheaded? Many Republicans are happy to describe Barack Obama and Joe Biden that way, and it's not clear to me that the former Presidents were anywhere nearly as overtly hostile to their political opponents as President Trump openly describes himself as.
It's a weirdly one-sided vision of conflict.
I mean, if I were actively attempting to kill someone, I would expect them to be pulling out all the stops in defending themselves, if not trying to kill me first, and I think that a lot of people would find it disingenuous of me to expect that the other person would treat me as if I weren't ready, willing and able to do them harm. But that might just be the circles that I move in.
Because there seem to be a lot of people who not only see themselves as being obviously the Good Guys, but expect their opposition to see them that way as well. Which I sort of understand, but it strikes me as an outlook on the world that is immature bordering on actively childish. But maybe this is because I lack a sense of the world as being divided between forces of Good and Evil, and where the two sides understand the roles that they play in the greater narrative. Perhaps if I saw one or the other side as being deliberately perverse, I would also be of the opinion that they're the only side that would think to use unjustified aggression and that they would also realize this.
In this sense [President] Derangement Syndrome isn't a behavioral descriptor, but a moral one. So of course partisans don't use it to describe members of their own coalitions... to do so would be to call those people out as purposely wrong-headed, and violate tenets of in-group solidarity.