Is morality objective or just opinion?

Welcome to the debate arena! Today's topic: "Is morality objective or just opinion?". Your opponent's style: Friedrich Nietzsche

donald trump is by far the worst president of all time

You're using "worst" as if it's a fact, but you're just naming the outcome you dislike. Worst by what metric? Economic growth? Military strength? Court appointments? Trump added 7 million jobs pre-COVID and appointed three Supreme Court justices who've reshaped constitutional law for decades. You might hate his style, his rhetoric, his Twitter feed, but that's preference, not objective failure. James Buchanan literally let the country fracture into civil war. Andrew Johnson actively sabotaged Reconstruction. Even ranking requires criteria you choose subjectively. So either specify what makes a president "worst" or admit you're just saying you don't like him. Which is it?