Here is a slightly better bg replacement for you., I still think you should replace the image entirely though.
Hard difficulty still suffers from odd spacing choices
00:24:368 (5,1,2) - 5 to 1 is huge, but 1 to 2 is small. These should be similar
00:22:603 (1,2) - 1 to 2 have no movement, but the rest do.
01:11:133 (3,4) - This distance space is really big, especially with the direction change into a triple
00:04:515 (4,5) - The spacing from 4 to 5 is huge compared to 00:05:397 (1,2) - This is a hard, I'd recommend keeping your spacing more consistent.
01:20:397 (3,4,5,6,7,8,9,10,1,2,3,4,5,6,7) - This feels so active, but the song is winding down so this amount of rhythm density feels out of place
This map has a tendency to ignore the corners, which makes the map feel claustrophobic. The middle of the screen gets way more action than necessary
Take this note for example 00:02:971 (6) - , this could be a good opportunity to move to the left side, but instead it goes back to the middle, and then 3 notes later the player is directed back into the middle 00:04:515 (4) - Maybe the background being square made you ignore the corners xd. Remember you can go to the edges
I would avoid these kind of overlaps on a Hard 00:31:868 (2) - this isn't supposed to be a reading challenge right
00:46:427 (10,1,2) - I just think this kinda flow is ugly and confusing for a Hard
00:54:368 (5,6,7) - More ugly flow
00:57:456 (9) - Don't do sliders like this, players won't be expected sliders to stop in the middle, and I don't think this slider is trying to represent something in the song
01:03:412 (4,5,6) - More odd flow, just keep it conventional
01:05:838 (3,4) - Huge spacing, ugly flow again
01:10:250 (9) - More examples of trying to hide notes where previous patterns were
01:13:118 (2) - Huge spacing, tone this down
I would suggest that for your green lines before the kiai, that you should use the Soft sampleset. 00:00:000 through until 00:29:221 when you can start using normal for the tapping emphasis.