Some combination of GINI, average life expectancy, number of bankruptcies, business closures, unemployment, changes in all-cause mortality, median household debt, disposable income, educational attainment, and so on.

If you look at a basket of well-being measures as opposed to raw GDP it's hard to argue that Trump has done a good job.

Of course Covid has had a big effect. But there were many policy options for handling that, and Trump - and his far-right equivalents in other countries - reliably picked some of the least effective ones.