Re: We're doomed.
Well, if it's 'History repeating itself' as you say, then will it be Revolutionary France, Nazi Germany, Stalin's Russia, Cultural Revolution China, Pol Pot's Cambodia, or Slobodan Milosevic's Yugoslavia?
In each case, it's always the educated people like you and I (the so-called 'liberal elite' this time) who get murdered by the uneducated masses and their populist leaders, while the real rich & powerful who have actually caused the major fuck-ups (e.g. rees-mogg, farage, raaaab & co) generally get to flee.
Honestly, I would prefer to be annihilated in a nuclear blast than get hacked to death by a machete-wielding mob, or my starving neighbour who wants the contents of my cupboard. Nuclear war is optimistic, as far as I'm concerned :(
Our society is so fragile now, you'd only need to kill the Internet for society to collapse. Drag an anchor across the Bristol channel, and suddenly nobody can do their jobs due to reliance on Cloud services, nobody gets paid, cards don't work, supermarkets like Tesco can't even take cash when the Internet is down, thanks to their cloud-based ERP, etc etc.
BTW: Austerity was just a way to try to put the brakes on a lending system that had got out of hand. It's only a halfway point between the pre-2008 circle-jerk and actual reality, whereby countries have to actually produce stuff to be rich and plentiful.
In said actual reality, the Pound is worth less than a Zimbabwean Dollar, and industrialised nations like Germany, Russia and China can walk all over us.
The basic problem is that humanity has grown too numerous to be stable. World War is inevitable, and in Britain, we're fucked.