Democracy is a lesser evil, which many people born into it fail to appreciate because their imagination does not render the greater evils realistically.
What gives you the impression that Corbyn is against democracy? In fact, he participates in the 'democratic' system of his own party and of the UK. I personally refuse to participate at all in the bourgeois democracy, but that doesn't mean I'm against democracy as a principle.
Because I have the impression that there's nothing I can say that will make you consider my arguments -- as I live in a democracy --, or to even think about them -- as you also live in a democracy, and as you seem to have accepted as a principle that "democracy is a lesser evil".
It also so happens that I'm dumb enough to have wasted time listening to arguments from neoreactionaries living in democracies and thinking about them. But mainly I think the test should be empirical.