Actually no he does not come across as that at all. Those are democrat talking point labels and as the Primary showed they did not sell well to voters. Same with the polls recently.
Ugly isn't just in the eye of the beholder. Anyone who is a successful businessman who has to resort to using cutesy pejoratives before the first name of anyone he is in disagreement with is operating on a grade school playground bully level. ("Dopey Prince Al-Walid", "Crooked Hillary", and others).
There is no shortage, in that environment nor this of people who will take up the taunt, but that doesn't make it true.
That so many Americans would fall for that nonsense is an indictment of our culture, to be sure, but for a prospective head of State to conduct themselves in that manner is an embarrassment at best.
Is this how he is going to treat the few allies we have left if they disagree?
Is he going to slander the JCS and expect performance later? The Cabinet? The Congress? Even the scumbags in our government have a point where they will not take being ridiculed and humiliated and will strike back, in whatever way they can, even if it is just mass resignations.
He has already alienated a number of conservatives not willing to kiss his ass for the promise of position or power. That may be enough to cost him the election, even in the face of Hillary as an alternative. If he can polarize the party with his vile behaviour to the extent that there are many who would not vote for him in his own party, what do you think that portends for the future of a Trump Administration?