Happy New Year to you as well
Are you filtering unwanted low end with a High Pass filter EQ on those sounds and what are visual spectrum tools like Voxengo Span showing ? Sounds like rumble under the 30 Khz to me, Nugen Audio Visualizer confirms this. You don't need those low freq, might be on the sub part of the bass, layering a sub & bass might also require some tweaks with EQ to avoid the 2 sounds to fight for space in the same frequency range.
After that, it could also be something more close to the sound source like filter cutoff of sub level & main level of the synth ( if it's not audio of course ) as well as Midi notes length & velocity, those can sometimes have drastic effects on the sound.
Didn't know about that guy Hemanifezt, like the voice as well, will check out the site
Agree that it's much easier to make music for vocals instead of putting vocals on an existing track, in the second case the vocals needs to really sit in the key & mood of the track indeed, but for me it's working fine with this track.
TBH I didn't noticed the noise too much, I've seen spikes between 16/19 Hz listening to the track through Nugen Audio Visualizer and heard some kind of vinyl crackles, it works for me but maybe I'm reaching this age where I'm loosing some high frequencies hearing ?? Haha, could be, but most of the time the Focal Solo 6be monitors are quite sensitive & translate high frequencies very well with their beryllium tweeters and I still pick up when something is too much aggressive in the higher range. Now of course, that's all relative to the kind of noise & frequency range used in your track but no issue for my own listening here.
In your great comment about another member Trance Track feedback you mentioned the following :
"Use mono to roughly select your panning positions and reverb levels... No idea why, but you hear much better when it's in the right area."
That's the benefits of mixing in Mono, it really unmask sounds but then we're back to the way our ears perceive sounds, so slightly moving a mono signal left or right will make it sounds better than letting our brain perceive the sound in the middle when the source is centered. It can be tricky as well but I think it's a good way to Mix, just need to take your time with it. Putting everything in Mono and not using panning will lead to sounds fighting for space in the same frequency range, panning too much could bring phase issues or making sounds really too much prominent in stereo, you'll have to compensate with the level then.
I rarely link people to Internet content about audio, because there's so many stuff and the good & bad "this is how you should do it" argument with every YT channels or website pretending to learn you the right way to mix, but do search and check the "Kush Audio After Hours" short videos from Gregory Scott on YT or Facebook, really interesting stuff when it comes to mixing approach, just good to keep in mind that it's not about Mixing EDM music, so the same rules won't always apply with a club banger 4x4 quite simple track, but I also believe in a philosophy of Mixing and sound quality to reach and definitely love G. Scott approach on the subject. The Kush Audio Plug-ins are really great tools as well, the parallel mastering EQ Clariphonic & the all Omega Saturation plug-ins are brilliant as well as their latest Silika compressor.