alt Hacker NewsWhat plot? All the plots in the article either (1) show the change for the worse happening in 2020 or later or (2) are explicitly comparing "before 2020" with "after 2020".
(I do agree that Mr Trump is a shockingly bad president in oh so many ways. But the malaise being described here doesn't seem to have started in 2016. Not every bad thing is his fault.)
Trump is a terrible president and person. Unfortunately, Trump derangement syndrome is also a real thing. We are a country full of fools of one persuasion or another.