Um, first off, the UK didn't freely join the EEC/EU. It was dragged into it illegally and unconstitutionally. And the only thing holding it back from leaving are the remoaners, including those in Parliament, who don't give a f*ck about democracy unless it works out in their favour. Funny that eh? Govt members ignoring what the majority demand when it comes to the right to self-determination.
And the EU isn't exactly working with the UK either, what with their "divorce" settlement nonsense and bombastic rhetoric.