Yeah, the collision boxes are way too simple in certain areas. Like for example in dungeons, where you're on a corner and next to some door frame, you can see the enemy between the wall and the door frame (so you don't need to expose your body), but when you try to kill them you just hit an invisible wall. Those collision boxes are also polygons that have to be calculated so they can't go very detailed with them, but sometimes it feels like some are quite too simple.
They can be as simple as necessary but they shouldn't be so much larger than the rendered geometry as the collision geometry is in some places