Trump was never really considered electable, by traditional metrics. I do think he's gotten worse over the years (covid was largely his tipping point into lunacy, even though his administrations policies were fairly coherent, and then the election loss went over the deep end), but it's not like he started out as a decent guy. 2016 is still hard to explain, even in retrospect.
ברוך הממליך מלכים ולו המלוכה