It grows on you and you become addicted to hunting. I finally could complete it, although I ended up using a guide and doing some leveling up in the autogenerated tombs.
The missing half star is for the rough performance in some parts and not so friendly learning curve. I don't think FromSoft should be safe from that kind of criticism. It's been my first Souls-like game, so I expected a learning curve, but Bloodborne did not feel as "the beginner friendly Souls-like".