Would you like to here this song in English?
I did not understand the rap due to being Russian but I can at least say this.
The mixing of the vox and music bed were completely off. The vocal is way to hot and seems to be rather a dry mix. I would suggest some sort of reverb or delay (or even both) to add something to the middle end of the track.
As for the music track itself it sounds as if you are very low in volume. Compression “could” take care of that but at the same time if your mix is not solid it could only bring up the areas that are weaker.
Eq is your friend.
I only critique this because I couldn’t understand anything being said and was left listening to the music.
I don’t understand it, but the russian language itself sounds awesome! <3