I mean, there's got to be a spectrum of nuclear winters, just like there's a spectrum of volcanic and impact winters. Assuming a full scale nuclear war, there's still questions of how much of the arsenals actually detonate(as opposed to failures to launch, getting destroyed by other nukes first, etc), how much the fires burn, the time of year impacting fires and dust and the state of the biosphere, and how much the aerosols are limited to the northern vs southern hemisphere.

Think about all the ways you could die from nuclear war + winter. There's some worth avoiding(slow painful death from radiation, moderate burns, trapped in collapsed buildings, etc), and others that you might be willing to delay/prevent in a hope of things getting better(starvation, cancer, civil unrest, etc). There are ways you can reasonably prepare to increases your chances, if you're lucky in the critical moment of nukes dropping, to survive long enough to attempt forming communities and farming again.