Yes people are going to have to change their habits, or front the cost for things like solar panels etc.
I appreciate how this sounds, but most people can survive and will be fine inside with very little to no heating during winter.
I lived in a flat in Peterborough on my own, that had such poor insulation and electric heating I didn't bother using it.
Yes you could see your own breath inside, but wear warm clothes it was fine.
We have had it too easy for too long, living in western luxury. But globalisation and the internet, now everyone wants a piece of that and there isn't enough to sustain that lifestyle. Yes COVID/Ukraine have expedited this.