There’s only really 2 gimmicks I found annoying, the second one much more than the first*.
The on that annoyed me…though not that much, was the way enemy can just dodge attacks, more particularly the sisters in the endgame after the main plot happened.
Even with the bat equipped, using the throwing knives, they sometimes got to completely ignore my attacks. Take that with the fact throwing knives aren’t refunded after the battle is lost, I kept losing them over and over and inevitably had to reload a save before that fight to finally have my dice rolls work.
It didn’t annoy me that much simply because I had a save not that far away. The walk back over to the fight wasn’t too long from the top of the map.
The mechanic that really annoyed me on the other hand, was the way many of the boss fights have a way to install the player after about 3 to 4 turns of dealing damage unless all of their limbs are disabled.
It annoyed me as those bosses have a tendency to regain all their attacking limbs at once. It makes using the upgraded knife practically a necessity when I sometimes wish I could use other weapons like the bible or the torch that works so well against the giants and every manner of tanky enemy.