I certainly don't like his Taimanin's work, but rather than dislike it, I think there are a little disappointing works.
Personally, I like Taimanin's suit costume.
However, I don't like Raikou's background music, and the bleak and unclean stages in Don't Give Up are a negative point. In my personal opinion, the biggest reason it's "unusable" is the ugly faces and poor coloring of the orcs and goblins.
I understand respecting the original, but Taimanin itself is a hard adult game, so Hilichurl would have been fine.