In a lot of these cases I think people are organizing themselves around what they don't want, more than what they do.
What they don't want, typically, is a government that is heavily invested in economic globalism.
And more importantly, one made up of people who openly despise them.
With Brexit, I don't think it was ever mainly about short term economic advantage, it was about the ability to make decisions in the best interest of the nation. Ideas like, you have a right to live and work in Europe were never that compelling for w/c people in the UK. I don't think it's at all clear that it's going to be a failure, I don't think we'll really know until 20 or 25 years down the line.
I don't know that any of NFs policies would be that successful in the end, and I don't care that much because I'd never vote for him, but he's sure better at relating to the interests of regular people than Labour candidates are.