General
Widescreen support and epilepsy warning is enabled. Are you going to apply a storyboard at some point?

The combo colors decrease in color intensity, which is cool, but I feel like you need some red colors in the chorus and the solo since it's metalcore. Lemme mix up some for ya:
Combo 5: 159, 0, 0
Combo 6: 225, 0, 0
Combo 7: 255, 85, 85
Combo 4 would be used here too
^ mix those around as you want lol
^ Use those for the chorus and maybe even the solo. It will take some work, but it will spice up the overall feel of the map when you see different colors for intense sections. You can also do a yellow color on combo 8 for every time an 8+ note stream comes up, since they are pretty distinct for the song too!.

example for yellow and maybe gray: 00:44:611 (1,2,3,4,5,6,1,2,3,4,5,6,7,8,1) -
In the chorus, the slider shapes don't represent the intensity and emotions very well. if a lot more of the sliders in the chorus were sharp rather than curved and linear, it would create a much better feeling for the map overall.
For other distinct sounds, a higher SV or a more abrupt shape would help too. It would make the map seem more interesting overall as well.

SOME suggestions will be mentioned in the section below, but it applies to a lot of places, so I'd do some self-modding and stuff as well
Filesize is 12.2MB. I'd suggest making the background 1366x768 because of this. It's not unrankable anymore to have it 1920x1080, but it'll speed up downloads a fair bit, since the background is almost 1 MB. You can technically make the audio file 128 kbps too, but that'd probably piss off a few modders haha (;.
When I looked through hitsounds, half of the hitsounds wouldn't add onto the program. It's an issue with the hitsound, since modding assistent points out that they aren't wave files, even if .wav is what's mentioned. Lemme write the ones that didn't load up:
drum-hitclap.wav
drum-hitfinish.wav
drum-hitnormal.wav
normal-hitfinish.wav
normal-hitfinish2.wav
normal-hitfinish3.wav
normal-hitnormal.wav
normal-hitnormal3.WAV <--- yes caps
normal-hitwhistle2.wavAccording to the modding assistent, normal-sliderslide3 is unused. remove it or use it xdStats:
AR9.3 is pretty low for a 210 BPM stream map. I'd increase it to 9.5
OD8 is also pretty low for how the star rating/BPM is. You could increase it to 8.5 or 8.6 if you want, but yeah
HP is fine

4eva
00:21:897 (1,3) - Switch and make the first two notes different in some way, since the 3 is on the white tick and is the strongest part of the stream. If you don't NC that, then NC 00:21:754 (1) - instead.
00:24:040 (1,2) - I don't think this is on purpose, this is the only time in the entire song where you do this. If it is, I don't understand why xd
00:26:040 (5,6,1) - Flow is pretty linear for the 6,1 jump. I'd probably make that transition sharp. You do something like that on 00:27:182 (5,6,1) -
00:39:468 (2,3) - I'd add a bit more spacing here to account for the next jump, I felt like I had to slow down I played this part, even if I hit it.
https://osu.ppy.sh/ss/723006900:41:182 (1,2) - same concept here.
00:59:468 (1,2,3) - triple part is slightly off, not by much tho
01:00:182 (6,7,8) - I don't feel like there enough feedback for a triple here, a 1/2 stack would be dope tho.
01:12:611 (3) - moving this to stack with 01:12:040 (1) - will make the kickslider feel a lot more intuitive due to a back in forth pattern. It's kinda in an awkward position atm. :3
01:27:897 (9) - Random suggestion, but the song has a pretty different sound here that enough support for slower SV or a fancier shape.
01:41:754 (1) - Doesn't feel refined enough - idea:
https://osu.ppy.sh/ss/723010201:50:325 (5) - I'd add NC here. If you did colorhax, make this stream yellow.
01:53:611 (3,4,5,6,1) - star shape's a little off
01:55:040 (1,2,1,2) - inconsistent NC'ing, remove the first one.
02:08:754 (5,6,1,2) - Those distinct sounds should have something that tells them apart from other patterns in this section. my idea would be spacing this a little differently.
https://osu.ppy.sh/ss/7230137 You could also make sharp shapes here.
02:27:468 (1,2,3,4) - same idea with sharp shapes and stuff.
02:34:468 - There's almost no feedback here, so i'd either make a single tap from the slider this applies to and stack it on the stream for a 1/1 break, or silence the sliderend.
02:35:182 (9) - Extended slider (shorten by 1/4) and singletap?
02:37:611 (5) - extend the slider to this spot and silence it. The feedback is very low for a singletap.
02:52:754 (1,2) - make them regular sharp sliders instead since you don't utilize fancy shapes that much as a whole.
02:54:754 (6) - SV decrease 'cause distinct sound?
03:30:325 - I feel like utilizing the guitar sounds a little more in the
beginning of the solo too would improve your emphasis.
03:42:897 - make this clickable xdddd
04:30:897 -
I'd utilize stacks a bit more in this part, so it's not just pure low BPM jumps. becomes a bit too repetitive that way I feel like. Example could be 04:34:326 (4,5) - this one and 04:38:897 (4,5) - this, 04:43:469 (4,5) - etc05:25:182 (6,7) - only curved kicksliders I've seen in this slow section. I like the flow those provide, so you could probably use them more
05:29:182 (4,5,6,7) - I think they should be in groups of two instead - i feel like the song supports either, making 2 the more "common" choise.
05:49:754 (3,4) - symmetry? (curve both)
I think that the map is good in terms of flow and structure, but it's very generic in relation to the song. If you made most of the strong sounds more distinct, it would make for a map which is a lot more intuitive in gameplay.
Feel free to poke me if you want a testplay after you've applied the changes

I wish you luck~~