In re carrying a heavy load: do you have a backpack?

In re kale: I wouldn't say it tastes like cabbage, but when raw, it does have a flavor which is hard too describe but too bitter for some people.

Squash and turnip can be baked. I can't remember whether you have an oven.

What you describe about food is what I call poverty-based anorexia-- I've heard of one other case. I'd be surprised if there aren't a fairly large number of people who have it.