As my father said when I was a young man, no one who is qualified even wants to be president.
He also said of course all the candidates have massive egos. No one gets to be president without a massive ego. So regardless of appearances, Hillary and Trump are not the only ones with gigantic egos.
We may get screwed a little less with one candidate over the other. But we are surely going to get screwed.
I'll assume your hypothesis is true. (although I really believe Trump might be able to change the trajectory for the better):
My conclusion? If as you say, we're goin' down anyway, we might as well interject some fun into the ride! All the more reason to support Trump. <^..^>