this diff is much harder than a lowest diff normal should be.
00:19:505 (7,8,9) - this and the others the same as it through the map are essentially 120bpm 1/4 triples. i would timestamp it, but you can look at the entire kiai for this too. your 1/2 usage is at the very peak of what is allowed for normals. some patterns are even harder than that of what should be in a normal period. (https://i.imgur.com/p7RvQa1.png https://osu.ppy.sh/wiki/en/Ranking_Criteria/Scaling_BPM)
this map just generally has a Lot of consecutive clicking and holding. at 240bpm these rhythms are hard, and i think its almost no question you need an easy difficulty unless you severely nerfed this difficulty, which would include changing most of the patterns.
change cs from 3 to 3.5. current distance snap with current cs is super close together and overlaps on some skins. this is a decently difficult normal, pushing it up a little wont hurt
01:08:725 (1,2,3) - considering that all other stacks in the map are 1/4, i wouldn't introduce 1/2 stacks this late into the map, especially on a normal diff.
this diff is already pretty dense by a normal's standards, so players could already be struggling and don't need to deal with differentiating a single stack.
00:09:800 - having the same exact rhythm repeat every half measure here is a lot more obnoxious than in the other diffs imo.
consider making the "loop" longer into something like https://chanci.s-ul.eu/RGz8Y8Pn in order to provide some variety for the player
i briefly touched on it in 1366708#2160711 but i feel like this mapset could benefit from an advanced difficulty, or even a replacement hard difficulty while renaming the current one to Light Insane. the hard's difficulty and density is cracking the ceiling of what is acceptable and overall the 1.7* gap between difficulties is a lot by my standards.
even if you just get a gd, i'd say it'd be worth it to get another hard/advanced diff.
the drums change pattern here + keeping it smooth with a change on 00:23:340 (1,2,3,4) - would be really out of place with the rest of this section