That sour mood is not a product of the Trump administration; the last time a majority believed the country was headed in the right direction was right after the US invasion of Iraq in 2004. And this is not solely an American phenomenon.
According to global polls conducted by Pew, in France, Spain, Great Britain, Poland. Mexico, you name it, less than 40% of the public feel that their polities are headed in a positive direction. Notable exceptions are China, Vietnam and Germany, each of which have been doing rather well economically, though so have many other nations whose citizens are far less sanguine.