As to worst chunk ever: I was inspired to try this by you. Well, I did a normal setup except I didn't want to perhaps spawn off the map. I set my spawn to 0, the original spawn. I spawned halfway up an eighty to one hundred block cliff with nowhere to jump to. It was Groundhog's Day, the driving off the cliff scene, every spawn. Better luck next week
In a challenge like this, I think you need some advantage that you can utilize to be able to make a go of it. Perhaps you allow yourself to creative in one item/block. Maybe a bucket of water or a copper pickaxe. One thing that you can choose once the chunk is loaded to give you a fighting chance. Otherwise the novelty will wear off pretty quick
For chunk progression you can make a 1 world chunk and if you lastx 2 days you can choose 10 items to take to the next chunks. Then you make a 2 world chunk and spawn the items in in creative
I've tried 1x1 and 2x2 chunk worlds a few times, and I think you really need to allow yourself to reroll a couple times or start with some manually spawned resources; the game is unplayably brutal for any amount of time if you don't have a handful of things in your world simultaneously: trees, water, clay, dirt, cattails, metal deposits, flax, some sort of food crop, and ideally a resin source. A few resources can be obtained from panning, but only in limited quantities, and lack of storage options at the beginning makes panning extra tedious. Flax fibers can in principle be gathered from monsters, but the drop rate is terrible. Generous metal deposits, tool lifespan, and tree growth speed are also good ideas if you actually want to survive long enough to develop technology before you completely exhaust your chunk's resources. Definitely interested in seeing more folks tackle this kind of challenge, though.
Really cool idea! Also to conserve hunger I thing sitting down slows your hunger rate? (also sidenote, what mods for your hud are you using? they look pretty neat!)