It was Charles Kruthhammer who identified the reaction to President George W Bush as "Bush Derangement Syndrome" defined as ""the acute onset of paranoia in otherwise normal people in reaction to the policies, the presidency – nay – the very existence of George W. Bush." The condition subsided during the Obama era, but emerged again with the election of Donald J Trump as President and re-defined by Kruthammer a harsh critic of Trump as , " Trump derangement syndrome is described as a Trump-induced "general hysteria" among the chattering classes, producing an "inability to distinguish between legitimate policy differences and ... signs of psychic pathology" in the President's behavior."
If any US President makes key decisions and implements them over his/her term, some of these decisions would have to be good ones on the law of averages. Even if only 5% of Trump's decisions were benign and helpful, one would expect that they would receive due recognition by everyone.
Justin Raimondo, a self-described "conservative-paleo-libertarian", divided the "syndrome" into three stages; in the first, those who "lose all sense of proportion," next, they experience "a profound effect on ... vocabulary" and begin to "speak a distinctive language consisting solely of hyperbole," and, in the final stage, the afflicted "lose the ability to distinguish fantasy from reality." Jonathan S. Tobin defines it as "disgust at his manner and his tweets such that all distinctions between him and genuine villains is lost." Fareed Zakaria defined the Syndrome as "hatred of President Trump so intense that it impairs people’s judgment."
I feel that all of these definitions are valid, my personal favorite for the President's job was Ted Cruz, but I believe Brexit, Trump and the emergence of Europe's right is the forced adjustment by the people to a creeping communist, leftist, Greenist Liberal undemocratic movement.
I rely heavily of Wikipedia for references and hope others will develop the topic. The word Hyperbole is defined as "exaggerated statements or claims not meant to be taken literally"
Having thought about it, I believe this condition exists and is closely related to mass hysteria. It's caused by the emergence of mass media and social media where ideas are acquired and built on. Sufferers cannot accept that (with a few exceptions), they have three ways to realize their dreams, 1) get lucky and win the lotto, 2) vote and hope other voters share you view and 3) complain. I don't buy lotto tickets, I learned a long time ago that voting is futile and that complaining only serves to transfers one's frustration with like minded people and imposes one's derangement syndrome on the unwilling ears of the rest of us.
I do not find the syndrome in the general population of Ireland or America, I would guess 10% at most. Having thought about it again, I suspect that it is the determined refusal by a minority to accept the democratic will of the people by every means short of armed rebellion. Few societies can please everyone.