I'll try it!
My entire life I've had this crippling deficiency: I hate 90% of greens. Ever since I was a little kid.
-Brussel Sprouts
-Cooked Spinach
-Cooked Broccoli
-Bok Choi
-Cabbage
-Kale
Basically all, the stronger the flavor of the green, the worse I hate it.
I do like most greens raw. Lettuce and spinach are good. Cooked peas and green beans are ok too. The extra problem is though, entirely likely to my eating habits over my life, my body does not process raw fruits or vegetables very well. Could easily be a deficiency in my gut microbiome and that is correctable. But it's actually made it hard to eat some of my favorite fruits or raw greens I like. I can't eat apples because I simply don't digest them completely. Same story with a lot of other stuff like olives (which I fuckin love pretty much every variety of olive I've ever eaten.)
Too me most bulk vegetables are far tastier raw, and the crisp texture make it way more palatable to me.
Sound like you've got a problem with
wet heat-cooked greens.
And honestly, there's a damn good reason to hate these - more often than not, they're a tasteless mush with the texture, and palatability, of snot.
Of the stuff you mentioned,
Brussel Sprouts are an easy fix - don't boil 'em, roast 'em. Roasted sprouts with some balsamic vinegar are
awesome - I could, and did, eat a kilogram a day and still not be sick of them. The downsides are, well... propulsive in nature. Probably would be worse in your case.
Broccoli - just don't overcook them. They really don't need much cooking, if any at all. Mostly, you cook them just so they aren't tough, boiling them for ~2 minutes is enough to keep them crunchy. Also - salt the water!
Spinach is an odd bird in that it's pretty much exactly a pathetic mushy mess and I don't know of any way to prepare it differently other than eating it raw - but I kind of consider it as a
platform for delivering tastiness - it soaks up seasonings and it's basically only there as a thickener.