Alright let's see what I can find.
General:besides the taiko diff. no kiai time or a kiai burst? suggest that you set a kiai burst from 00:36:530 to 00:36:623, and 2nd kiai burst from 00:42:530 to 00:42:623...ill stop here. i'm sure you'll get what i'm following.
Hate:00:42:530 (1,2,3,4) - personally i don't like where these notes are placed. it looks like you placed them randomly. so move (2,3,4) to the point that this combo looks like a parallelogram. if you don't know what the shape looks like, it's like
this.
00:47:030 (3,4) - make these curved sliders like (1,2) for a nicer flow.
01:03:530 (2) - this curved slider looks a bit ugly. make it nicer.
01:22:280 (1) - remove the clap because it ruins the consistency.
01:41:030 (3) - remove the whistle at the beginning and at the slider body because it doesn't sound nice. instead add it at the end to make it sound like (1).
01:44:405 (4) - same as above but make it sound like (3)
02:51:530 (3) - remove the whistle at the sliderbody since (1) doesn't have it.
02:54:530 (4) - same as 01:41:030 but i'm sure you get the idea.
02:58:280 (6) - ^
03:03:530 (2) - add a clap at the end to keep consistency.
03:07:280 (4) - same as above but just add a clap.
03:12:530 (3) - same as 03:03:530
03:14:030 (1) - this wave looks ugly mainly because of the end. make it nicer.
03:15:530 (3) - same as above but at the beginning. this is arched too high. ^ and same as 02:51:530
03:18:530 (3) - same as 01:44:405
03:21:905 (3) - same as above but make it sound like (1)
04:00:530 (1,2,3,4,5,6) - same as 00:42:530 but i'll let you take care of this.
Hurt:01:47:030 (1) - this spinner is unrankable because it has to reach at least 2000 to be rankable.
03:24:530 (1) - ^
eikka's Heart:00:24:530 - try
this or something similar to this as it follows the vocals and the long pauses in vocals?
00:30:530 - ^
01:00:530 - ^
01:06:530 - ^
01:48:811 - remove the break because it appears right when the circle is hit and the bar doesn't decrease that much.
02:14:030 - same as 00:24:530
02:45:530 (1) - hmm move this down because it's touching the Hp bar. since this is near the end, players might mess up because if that.
03:13:280 (1,2,3,4) - this looks confusing so make this stack into a stream. i saw something similar to this near the beginning. if i'm right then do the same thing.
03:26:311 - same as 01:48:811
03:27:530 (1,1,2,3,1,1,2,3,4,5,6,7,1,1,2,3,4,1,1,2,3,4,5,1,1,2,3,1,1,2,3,4,5,6,1,1,2,3,4,5,6,1,1,2,3,4,5,6,7) - this is why i told you to remove the long breaks on this. it's following the vocals/instrumental.
This is the best I can do. GL