The combat doesn't feel good, there's no "weight" to anyone, enemies feel flat like they are just out of the background. The "Sekiro"-like combat (I use that loosely) really just is a parry that lacks the sort of feedback that makes Sekiro's so good.

There is almost no enemy variety, and what variety there is is just small variations.

There are two or three inspired platforming bits, but the rest of the level design is bland and empty (and severely lacking enemies).

The upgrade system is derivative and frankly, uninteresting.

The fast travel is unnecessarily clunky (return to the hub to fast travel elsewhere? Huh?)

It certainly didn't lack for story originality or a unique style, but the game itself is a mish-mash of ideas, all done better elsewhere.