Ach, as we are all being philosophical, here is my glass half full worth :-)
He is not actually that bad. What make him seem bad is that he is not clever enough to hide it.
Think of how stupid the average person is, and realize half of them are stupider than that.
George Carlin
I reckon I am below average on the smart stakes. Just a little maybe, but below average for sure. There is loads I can't grasp that other people can. And no matter how much I try, I just can't get it.
But I rate myself far smarter than Trump. And when I think of what I don't and can't understand, and think that about 45% understand less, then I think as a species we are doing amazing well.
And look at what has happened when the world had smart leaders. The Austrian Corporal that you mentioned, Mao, Stalin. Combined, they killed something like 170 million.
And we have learned lessons from that as a collective whole. I can't see us having another Mao.
Human societies are changing at an incredible rate. We have devices in our hand now that just 30 years ago were seen only in Sci-fi. And so many things are changing all at the same time that nobody can really say what is causing the negatives.
But the overall gradient is positive. Wars kill 70k now. Not 700k.
I reckon Trump is really a blip. And I think humanity will learn from it, over time.
Then again. What do I know. We could ask the really smart people I suppose. But I think they are too busy designing new computer chips and medicines. So busy doing that that they don't bother with politics.