Potatoes, (except certain fries/chips/crisps) Iv hated them my whole life, and my tolerance has only gotten worse lol. I hate mashed potatoes more than anything, everything about them is gross to me, the texture, the smell, the taste, the color? I dunno, never been a fan.
I also dont eat freshwater fish, also never been a fan of the taste, and i have tried very hard to get over that. Over the years I've basically entirely cut out all sea food.
I enjoy the taste of shellfish but its never been something I've craved, so it wasn't hard. If someone I know makes it and serves it to me, Ill eat it. But otherwise I just feel like our oceans are a mess and so is the industry around fishing/meat farms etc (i guess tbh i dont eat much meat period anymore either, not vegetarian though)