While most people will proudly claim they want to vote one way or the other, a good percentage of the population, doesn't want to say 'I Vote Trump', because they are afraid that their voting choice will not be socially acceptable in their circles.
There is a huge distrust of media in the US, and pollsters are seen as part of that. I do think there is some component to bias influencing the election and how polls can be either manipulated or withheld to manipulate that.
Personally, I think we'd be better off politically without pollsters and less polarized without the media complex.
The tl;dr is that there's more evidence against it than for it.
Polling errors are typically caused by unrepresentative polling - southern latino voters (one of the key shifts for Trump in Florida) in particular are hard to reach for polls, because there can be a language barrier.