Trump wins probably the most impressive victory in history.
Hardly "the most impressive". He got a nice margin in electoral votes, but other candidates have gotten more. And the popular vote was almost even... not that that matters.
The only reason it "looks impressive", is not because of any particular greatness of Trump. It's merely because the media predicted it wrong. Sounds like they impressed themselves... but they do that a lot. And the only other people who though it "impressive", were the people who believed the mainstream media. Hopefully they now know better than to do that again.
One thing that was impressive, though, is that despite being outspent more than three to one, and without the backing of his own party, and without very many celebrities swarming around him... Trump won anyway. And that's because the American people wanted what he offered, a lot more than they wanted what Hillary has been offering (and failing to deliver) for thirty-plus years.
Now, that's impressive.