There are many factors surrounding Brexit, perhaps most controversially immigration. But I believe it would be a mistake to think that this is the average Leave voter's main concern. There is something far more powerful bubbling under the surface, something almost unconcious but nonetheless driven.
The West, and perhaps especially Europe, has become increasingly Orwellian as of late. Mass rapes are covered up by the police due to underlying fears that it does not suit a particular political narrative, just saying or writing things about particular demographics can get you a prison sentence (which many people are very pleased about), facts and statistics are condemned or censored if they do not fit the right narrative, major social media sites with millions upon millions of viewers cater news feeds to fit a narrative, and all the while news corporations fuel anger by giving ridiculous attention towards silly protests at petty trivialities such as adverts that don't appease those with corpulent bodies, or pop songs that are slightly too racy.
This is a world where you can lose friends, your job, and can villified by millions online for saying the wrong thing (even if it is factual), or for even wearing an innocuous shirt. The media stirs up hatred and vitriol in people to fight between each other about the transgender politics of toilets in some backwards state in America while an attempt is made to stone to death a trans person in the street in Germany by two men who belong to a demographic of whom over half in this country think gays should be punished by the law, and yet we cannot worry publicly about this without being labelled with terms that could get us totally outcast, simply because said demographic is surreptitiously given special priveleges.
Some of the Remain campaigners are the most Orwellian citizens. Just think of those protesting against the democratic vote, holding up signs with slogans such as "We love the EU!". These are people proclaiming love for a unelected bureaucracy which has a powerful but often clandestine role in controlling the lives of the people in the country's it rules over. It does not care about the individual, it favours big business over small ones, and it gives all the power to the richest countries and none to the poorer ones, even making it especially easy for the richer countries to suck the poorer ones dry (such as Greece) and spit them back out again. Just imagine the level of cognitive dissonance required (or shall we call it doublethink?) for people who call themselves leftists to proclaim that they feel love for this neoliberal establishment above all other establishments. The only way such cognitive dissonance can occur is through long term brainwashing.
Whether or not leaving the EU looks as if it will really makes any difference to how Orwellian the world has become makes little difference. The point was that most of us had a good sense that this was a vote to prove how many there are who dislike the establishment. If Remain had won, that would be it; there would no more chances to shake things up and stop us from going down this increasingly Orwellian route.