Weren't you the one who was gloating about how Trump's approval rating was at 44% on the RCP average and anticipating that it would continue to climb?
If Trump is at 44 it means he is really at 50. He won with like a 40 percent favorable rating and got 46 percent of the vote.
Against an opponent with favorables only a couple points above his, give or take.
There is nothing special about Trump winning with those low favorables, and the only takeaway from that race is that if an unpopular candidate wants to win, they need to make sure they draw an opponent who is at least almost as unpopular as them, if not more. So I'd say your calculations are off.
Of course it is special lol, he won with lower favorables than any other president. Part of it was Clinton but part of it was that there is a large contingent of people in this country who disapprove of Trump but vote almost indistinguishably from those who approve of him (think Jeff Flake type Republicans).
He had a 61% disapproval in the state of Wisconsin the night he won Wisconsin. The notion that all those who disapprove of Trump will refuse to vote for him is silly.