Hate: disproportionately excessive penalties for falls (usually found in platformers).

If you get shot in the face by an enemy, you lose your shield, lose a life, whatever. In a bad platformer, if you don’t time a difficult jump exactly right, you lose a life, lose everything in your inventory, get sent back to the very beginning of the level, get audited, and have to mow the developers lawn for an entire summer.

Platformers are “guilty until proven innocent” - I won’t play one until I know it won’t destroy my will to live.