We've all got them, gaming pet-peeves. Maybe it's the unskippable cutscene, or the poorly placed checkpoint that means you've got to sit through the aforementioned cutscene once again. Maybe it's the end-game boss with a surprise second health-bar, or the random difficulty spike that doesn't feel fair.
Hunger mechanics. I don't find them fun at all even in survival games.
Valheim (and to a lesser extent, Palworld with the feed bag) had it right. You don't need to eat to survive but there was still incentive to farm and cook different food for the buffs they provide