This is the thing that makes any conversation about broad categories of food difficult—there’s just a huge range of ways to package those carbs, and people eat a ton of “hyper palatable” foods. A few hundred calories of Smartfood popcorn with a day’s worth of sodium and addicting flavors is quite different in my experience than, say, a few slices of chewy, crusty sourdough bread.
Try plain boiled potatoes. I bet you feel like stopping long before 2000 Calories. Tasty things are tasty and often easy to eat an unhealthy amount of.