Agreed, they aren't but on the other hand, winning virtually every single one, about 19 of them, is hard to explain. A "concerted effort" doesn't hack it, others have the same opportunity to vote.
Also, the one poll Trump lost, the CNN poll, it is being said, that poll was weighed 41% Democratic. He may have lost one of the other polls, I forget which one it was. If that is so, he lost about 2 of around 20.