I fear that is plausibly an entirely self-reinforcing result.
Trump is not an especially articulate speaker, he’s only a little bit above your NY “dese and dose”, though I do not mind that in particular.
But I think he created a lackluster impression by reverting to and repeating lines he has said many times before. In other words, he won no votes tonight, IMO. And...I do not think this impression of “no prep” is mine alone and it reinforces the “arrogant bully” accusation against him. I think he gave up a prime opportunity because most, possibly not all of her zingers were utterly predictable and could have been fended off, or even better, countered to the point of undermining her, had very very careful preparation been done. I saw no sign of it.
In contrast, I think HRC gained or gained back or solidified votes. All of those.
The polls say your opinion is nonsense.