I will agree that he isn't a person I would like to be president. But he is. My impression is that many of the people who obsess over him are most outraged that he simply became president in the first place. Then that gives rise to the "anyone who voted for him is an idiot" rhetoric. Those folks rarely look inside and question how they contributed to this. This doesn't apply to you, but Jim would be a perfect example: lives in a little bubble, probably interacts with people who mostly see things as he does, and can't fathom how any intelligent person might find his positions and manner so unpalatable that they might turn to the Dark Side.
Now, here's the part that we've argued about before. When you guys rationalized having a VP nominee who was one 72 year-old's weakened heartbeat away from the presidency, a blithering idiot, who makes Trump seem like a genius, you changed something. Everyone knew that her ascension to the presidency would be a very real possibility. But that was thrown aside and, as I said, rationalized. If she was acceptable, was it really that much of a leap to put Trump one place higher on a ticket?
Frankly, I don't know that anyone in my lifetime was "suited" for the office. Maybe HW Bush.