Bloodborne is two games:
The first is a generic 3D brawler. You mash the attack button at every enemy, and then you do the same thing. And then you do it again. You do this for nine million years, and it never becomes exciting or interesting. The world is drab and lifeless, all of the levels are forgettable, there are no meaningful interactions and there's too much damned level grinding. There are obstacles that have solutions so obtuse, so nonsensically beyond what any sane person would ever think to do, I'd swear it was made by Tim Schaefer.
Basically, it's Castlevania 2: Simon's Quest.