zahavasdad,
“I am very gracious to my host and would never insult them or make it seems like I am ungrateful”
I don’t doubt that; however, a lot of human communication is nonverbal, and if you are choking down something that you despise (your word), your host will probably notice your suffering, even if you’re thanking them.
“Like any other person there are foods you like and foods you dislike and some people dislike certain smells of things”
Of course, but you are really toning down your language here. Originally you used phrases such as “cannot stand”, “grossed out”, and “literal[l]y literally makes [me] nauseous.” I am not accustomed to hearing those phrases from adults, and we instruct our children to not use them when describing food. And no, we do not force them to eat things they really don’t like – but we we do try to teach them that others may like these foods, and such phrases may ruin their enjoyment and not be nice.
And although there is not much halachic significance to Ashkenazic cultural foods served on Shabbos as you have pointed out many times, many people do have deep cultural and familial ties to these foods. When readers see passionate and visceral disgust expressed towards their cultural foods, juxtaposed with more measured language when describing other foods (more polite phrases such as, “I don’t prefer”), I think they feel that you are attacking their culture.