The British voted to leave twice, both in the referendum and at the last election. This was after voting for the party that promised to give them the chance to decide on whether to be In or Out. That's democracy in action.
Whether it's good for British or bad we will see, but that wasn't the reason more voted Out than In. They voted Out because they saw Brussels taking more and more power away from Westminster, making their lives worse, because after 25 years they were poorer, the government was forced into spending more, foreign labour taking their jobs both low skilled and high skilled. But most of all they feared the coming end when Brussels would wield most power and relegate State Governments down.
Presently the only people in Brussels committed to stopping that are the Far Right. And Britain is yet to vote for a Far Right Party in any numbers that matter.
https://www.google.com/search?source...j0.vXg5SV9_eUk