Why do I feel unsatisfied after this very big lunch?

I had home made cabbage soup with rice, a microwave patty and a microwave Quesadilla from Costco for lunch today.

My calories seem high but I still want to eat more.

I want to save my cheese, but I ate all my nuts so I don’t have too many protein options now.

Why do I feel unsatisfied after this very big lunch?
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