Everyone's tastes are different, but I find cooked vegetables in large quantities to be nasty.  The other night, I cooked a mix of corn and green beans, in hopes of making my diet a bit more wholesome even than it already is, and I found them repulsive.  I am finishing them off by having just a small serving, a couples of spoonsful, with each meal with which they go well, as I do not believe in wasting food.  They will last me for several days that way.  I won't be repeating that experiment.

The source of vegetables matters.

For example, "big box" grocery store vegetables are often bland or worse, bitter and nasty tasting.

I started shopping at "locovore" and "organic" stores and non-palatable veggies became enjoyable.

A step further, we began growing our own veggies organically and the flavors improved dramatically.  For example, our Japanese heirloom turnips are sweet and nutty tasting and even the green tops are delicious compared to the nasty bitter Safeway turnips of my youth.

If you have the time and means required to tend a garden, it is two steps up from big box fodder.

Canned turnip greens is horrible. Any fresh green from the garden is so much better, even if too spicy or bitter for my liking. I used to hate beets (canned from the store) but fresh cooked are pleasant. Not everything grown in the garden is good, but that's due to varying growing conditions.