Trump started off strong, easily winning the first 1/3 of the debate. But he obviously didn't prepare for the hard questions, which is odd because he had to know they were coming. I guarantee you Hillary already has her answers ready for things about Benghazi and the Clinton Foundation. Trump's ADD is getting the better of him.
The focus groups disagree with you. The majority, of the 2 focus groups I read about, thought Clinton had it throughout the debate, to varying degrees. Even the members of the focus groups (who were independents) who leaned Trump.
The polls (not online polls, which are not real polls) are now coming in and showing that Clinton won the debate. The expression on Trump's face immediately after the debate showed that he knew Clinton had gotten the better of him.
But I understand that Trump's supporters are taking a cue from Trump: Never, never admit you lost (at anything). Even if you know you lost, say you won. If you say it enough times, people will believe you.
That is for real Trump's philosophy. Guess who else had that philosophy?
Another of Trump's philosophic beliefs: Never admit you were wrong. Never.
Another of Trump's philosophic beliefs: If someone gets the better of you or attacks you, double down and spare nothing and no one in attacking back full force....no apologies (and the truth be dammed). Unfortunately, Trump directs his attacks at little people with no power (like the beauty queen), so it amounts to bullying, really. Or, he attacks back by lying on the spur of the moment, forgetting that his prior statements are on tape (proving he's lying).
Another of Trump's beliefs (taken from Carl Rove): Whatever your weakness is, claim that your opponent has that weakness. (You heard an example of this in the debate, when Trump claimed his temperament is much better than Clinton's. Unfortunately it didn't work; the audience laughed.) You heard an example of this earlier in the campaign, when his team claimed Clinton is mentally unstable, can't control herself (this is in fact what some people have stated, because of his behavior - but it wasn't Clinton's campaign, at least at time).