Well, first, within a term or two people tend not to talk much about former presidents other than a singular event or two because so much occurred in between that they are more or less out of sight out of mind. Of the living presidents, you hear next to nothing about Bush, other than 9/11 really. Obama the same, except maybe for bin Laden and for econ junkies the bailouts done over the bridge of those two administrations.
Neither of those had big moments of controversy, really.
Trump, however, is so far beyond the pale, so obnoxiously abhorrent, and such a conniving crook, that he will live in infamy as by far the most atrocious conman to occupy the WH. He deserves his absolutely classless, rotten-to-the-core, place in history.