I think that depends on how you define ‘civilisation’. My inclination is that most people would say civilisation has ended if life is drastically different to how they perceive their life/world they live in. Think ‘civilisation as we know it’ rather than a dictionary definition.
However, I disagree that it’s not an existentisl threat, if only on the basis of possible crop failiures on a massive scale (reduced crop yields are a global issue already). Don’t underestimate the impact of food shortages on everything else, we in the west have become accustomed to easy access to food.
I’ll 2nd what hexagon said about going to a library or similar place. Trying to work around other people who are working helps to focus the mind and reduce distractions. If you can go to a library, this may be a good place to set up better practices, e.g. thoses others have suggested, first, then set up a work-only zone at home you can transfer that feeling of focus and work to.