I agree with this. But I’m confused what you are trying to say. Why can’t you just not praise the work you don’t like or just not talk about you don’t like. Then you have an overall positive sandwich that’s overall tasty. By the way I love whole grain bread.
Also, why would I change your sandwich it sounds perfectly fine?
Is sandwich an overall metaphore for something else?
If you can answer those questions maybe we can figure out how to compliment your sandwich.