The Biggest Disappointment from the Nov Election?

[aidbo]

11. What I'm trying to explain is that their methodology did work, to an extent.

Professionals (538) had the odds deep towards Trump’s Defeat?

No. 538 had the odds of Trump winning at nearly 1 in 3 which are decidedly not "deep towards Trump's Defeat".

There was, in my opinion, a general belief that Hillary 'had it in the bag'. That in itself could have (I stress could have) depressed turnout enough to put Trump over the edge in those three states that ended up making all the difference in the Electoral College. Only something like 77,000 votes more for Trump combined in MI, WI, and PA. Polling data is also suspect these days and their prediction models are only as good as the data that go into them.

I don't know a better way to put this to you, but I just don't think 538's prediction was as far off as you seem to believe it was.