A lot of the exit polls in 2016 aligned pretty much exactly with the last polls right before the election.

The biggest problem (in my opinion) was that most of the biased media would tack on opinion riders to their poll articles saying that the Hilldawg would win, even though the data clearly said both her and Trump were neck and neck and within the margin of error (which means they can't really tell either way who would win and they were just being biased pieces of shit).