Nootropics do not work on me whatsoever.

I don't think I can even claim a placebo effect. My stack:

600 mg Alpha GPC (NutraBio)

200 mg L-Theanine and 150 mg Caffeine (Nutrabio)
1000 mg Lion's Mane (Real Mushrooms)
Magnesium Bisglycinate (Natural Factors)

Noopept (A2Z Laboratories) -- have tried all recommended dosages though my scales are inaccurate, and I've tried a ~80 mg attack dose after weeks of no effect.

Have also tried Phenibut (Science.bio) -- tried up to 1.5-2g of edengrows powder and it didn't work, so I recently bought science.bio solution and ~750 mg did absolutely nothing.

I don't understand what the problem could be -- I imagine it's nothing to do with the supplements but something in my own body since not a single nootropic has worked on me in the last couple months. Has anyone been able to overcome this sort of issue?