Thinking about this as it's freezing where I am, and thanking my lucky stars we can stick the heating on.
I would be 100% shit in a tougher world. Anything from the grinding hardship of WW2 to dystopias like The Walking Dead. I'd be so shit
I mean, actually I wouldn't survive in the first place but if the universe was having a laugh and I did make it past the initial event, I'd be rubbish. I mean, obviously it would be very scary and devastating, but the sheer MISERY of it all would sap my motivation to survive, I reckon.
I can't think straight when I'm really hungry. Also, hanger would lead to some sort of stupid spat with the wrong person.
I'm also terrible without decent sleep. After enough sleep deprivation I'd give up.
Finally - even if fed and sleeping I cannot deal with no nice, clean shower or bathing facilities. I'd be SO CRANKY feeling grubby and dishevelled all the time, traipsing around trying to survive.
Could you adapt well and cope cheerfully without these basics after the apocalypse?