How can EU be the one expected to be inviting when they didn't kick the UK out in the first place? The UK is the one that left on its own. The EU doesn't have to do anything, I think they are quite open to the UK or anyone else in the continent joining. I just find it absurd a British person is complaining without the UK first doing the homework and showing joining EU is something tenable from their side via an internal vote about joining.
If you want a disclaimer, I am neither european nor british if that matters. From outside the situation seems very clear to me.