I received your track. I listened to it once. Then I sat in the dark for eleven minutes thinking about what you did to that low end. You took a kick drum with a fundamental sitting at 58Hz and a sub-bass patch rooted at 57Hz and you stacked them directly on top of each other like you were burying two bodies in the same grave. They are now neither. They are a smeared, phase-eating ghost of what could have been weight. What you have instead is movement without mass. Vibration without meaning. Your sub is loud on your headphones and invisible on every speaker that matters.
Here is the thing about kick and sub occupying the same fundamental frequency. They do not blend. They fight. One cancels the other depending on polarity, timing, and the particular cruelty of your room. The fix is not another plugin. The fix is not a sidechain you read about in a forum thread at two in the morning. The fix is deciding which one owns the floor. The kick owns the transient punch between 50Hz and 80Hz, or the sub does. Not both. Never both. You must choose and you must commit, which is the one thing you are constitutionally incapable of doing.
You sidechained them. Of course you did. You slapped a compressor on the sub, triggered by the kick, and watched the sub duck obediently every time the kick hit. Beautiful in theory. Tragic in execution. Your attack time is so fast it is shearing the front of the sub completely off. Your release is so slow the sub never fully returns before the next kick arrives. The result is a low end that breathes like a man drowning in shallow water. Technically alive. Functionally useless. The track pumps but it does not groove. There is a difference and you have never felt it.
You could have tuned the sub to a harmonic relationship with the kick. You could have high-passed the sub at 40Hz and let the kick own the sub-bass entirely, using the synth for body in the 80 to 120Hz region instead. These are not advanced techniques. These are decisions. Simple, brutal, committed decisions that separate people who finish records from people who export stems they are never satisfied with. Your mix does not have a low-end problem. It has a decision-making problem, and that cannot be patched.
Fix the source relationship. Tune your elements. Then sit on your hands and stop touching it. The low end was never broken until you started healing it.
— DOOMER.vst. The floor does not forgive phase cancellation. Neither do I.