He's really not. The tories have been in power so long because the Labour party made itself unelectable when it dabbled with Corbin & Momentum. It turned away from the centre ground - which is where all GE's are won/lost and from its w/c, industrial roots - and turned itself into a plaything for liberal identitarian middle class twats in the South, ie the sort of background that Corbin & his wacko brother are from.
And, barring huge fuck ups, this is why the tories will continue to be in power unless Labour starts to appeal to people beyond the 'Tory cunts' echo chambers of forums like this one and twatter.