Brexit happened because the racists thought EU was stealing their money. in reality its the other way around. Has the illegal immigration into Britain stopped since Brexit?
Economists and analysts at Cambridge Econometrics found that, by 2035, the UK is anticipated to have three million fewer jobs, 32% lower investment, 5% lower exports and 16% lower imports, than it would have had been. The report states that the UK will be £311bn worse off by 2035 due to leaving EU. The UK is not better off with Brexit at all, it is severely hindered by removing itself out of a trading agreement with it's nearest partners. (https://en.wikipedia.org/wiki/Economic_effects_of_Brexit)
Effectively, Britains future is always tied to the EU, as the EUs is tied to Britain. If Europe has a big economic failure then it will drag the UK down regardless of politics. If Europe has a war the UK will not be unaffected. If Europe does well the UK will also do well. Removing yourselves from being part of the decision making for the area that you are part of, especially when you had a great deal of influence, was monumentally stupid.
That all said, I understand why the British people wanted to lash out at the establishment. The problem is that they've been (as have we all, in every country) been manipulated by those who do not have our best interests as a goal. The problems in the UK came from, and could have been solved by, the political and business leaders, regardless of EU membership. They just don't want to.
Not necessarily: it could also mean that rather than being one voice among 28 in negotiations, they are now one voice against one (the EU as a whole). Potentially. More pessimistically, 3.6 trillion versus 19.4 (in terms of GDP). Or more pessimistically still, as you indicate, no voice versus one.
I think that the truth is somewhere between those options.
Immigration was a handy tool with which to entice the working class to vote for Brexit.
Immigration never stopped. It just switched from cheap Eastern European Labour to African and Middle Eastern cheap labour.
Once again the Working Class got duped. They voted for it.