First, and foremost, he's earning it the old fashioned way, by being a corrupt, incompetent, unstable example of Bad President Disorder.
It's showing areas where he's been able to paper over -- the economy -- and lean on are weakening.
That data is still lagging a bit on the deserved level of hate and disapproval.
Trump's campaign gets this and is spending...
*HE* is a moron, but he is surrounded by a *lot* of smarter people on the campaign side who know this and know how to turn this...
Don't underestimate them. Don't get cocky.
So endeth the lesson.