Well, Zelenskyy doesn't have Fox, Newsmax, OAN, Breitbart and numerous podcasters trashing him 24/7, like Biden does.
Zelenskyy's considered, rightly so, to be a heroic figure, but a lot of people also think that cleaning up the total mess that Trump left behind is a heroic act, too.
Mencken explained it best: "no one ever went broke underestimating the intelligence of the American people"