I didn't namedrop Cameron because I know Cameron didn't want to leave the UN. AFAIK he resigned because leaving was a really, really bad idea and he didn't want to have to deal with the impending train wreck.
I don't know if you're making a joke, or a mistake, or don't know, but you've said it twice now.
The UK is leaving the EU (European Union) not the UN (United Nations).
...you know we don't directly vote for our leader either right?
I think his point was more that we only vote in a few MEPs, while all other countries do the same.
The end result is that 5% of MEPs represent British interests, and 95% don't. Those 95% can pass laws against the will of our 5% and against British interest.
That's obviously the case for every other member too. But it just means we all get a bum deal. The member with the most power is the one with the deepest pockets, Germany, because Germany holds clout over the nations it is funding.
The sad truth of the EU is that often European ideals do not reflect national ideals. And at some point members have to decide which is more important. Keep Brussels happy, or keep your people happy.