They rank Biden #14, which is egregious enough.
But Wilson at #15??? Where do I begin to spell the ways that Wilson was the worst president in American history...resegregated the white house, screened Birth of a Nation, jailed political opponents, lied to get us into WW1 (look up the Lusitania manifest it was carrying munitions), instituted the federal income tax and supported the creation of the Federal reserve...also he stroked out with a year or so left of his presidency so his wife secretly ran the nation.
Terrible human being and that's not even getting into his propagation of the the concept of a living constitution, being a terrible historian and loving the Confederacy.