So you're ignoring all the mainstream polls, which were right on the money, and shifting the goalposts to a few exit polls in Ohio to "prove" the polls were wrong.
the point is that polls are statistical bullshit. There is no way the a poll of 1200 people is accurate for 330,000,000. pick up a stat 101 text and look it up.
I don't agree with that either. Polling cannot be perfect. It's diverse country. How do you get a perfectly random sample? How do you know who will follow up with actually voting? How do you phrase the question so you don't skew the results? How do you ensure the pollsters don't influence the results? Very few people are completely politically unbiased.
However, they do show trends and provide information. To call them "statistical bullshit" isn't right, but you can't take them as gospel either.