The Brit-Bongs genuinely don't seem to understand how bad of a situation the country has been in since prior to WW2.

Britain has been effectively occupied by Fabian Socialists since the interwar period. The London School of Economics has been the hive of this villainy. The Fabian's intellectual elites were the ones who originally claimed that arming their nations promoted war, so a refusal to arm despite clear intelligence of Nazi and Soviet mobilization was a constant problem. After WW2 ended they immediately pushed Churchill out and wanted to continue rationing as a way to force the population to become normalized to war-time re-distributive measures. They had quickly abandoned the Gold standard and created a uniparty system under the "Post War Consensus" for which the Conservatives have never attempted to rebel. Scotland and Wales are effectively socialist states (in the guise of "Social Democracy). The Fabians intended to use the EU as a continental project to deliver their Fabian Socialism to the rest of Europe while using the Americans as a blunt instrument to keep the Soviets off them.

The closest thing that England has gotten to a non-leftist government was Margaret Thatcher who demonstrated, not an application of non-Keynesian policies, but minimal economic literacy compared to Europe; and as such she and everyone who ever supported her has been smeared as right-wing terrorists who hated poor people and wanted them to die.

Britain has been co-opted for nearly a full century, no matter what some people in the UK would like to believe. 60 years ago, Enoch Powell was fighting a war he had already lost decades ago. The Labour party never represented "the working class", they only represented direct action socialism; and Britain experienced that socialism explicitly in the 1970's. Had Jeremy Corbyn been elected, it would have been merely a return to form.

The Culture War in the UK was basically all but lost decades ago, and it's only been making slight cultural shifts away from Leftism in recent decades. The UK can't try to win a culture war, it effectively has to win a cultural revolution that is going to take not 20 years, but more than 50.