That's basically how I've been living for the past 6 or so years. Nothing really helps honestly, I've spent thousands on every supplement you can imagine and tried every pharmaceutical that has made sense. While this is frustrating and disheartening it also is a clue that it's something much more serious than a potential b vitamin deficiency or something. It may be more about removing something from my system, rather than adding more.
I'm thinking it's either Lyme disease or a virus. I'm EBV confirmed but waiting on getting my IGeneX Western Blot.
Methylation has failed me, testosterone replacement, thyroid treatment, nootropics, vitamins/minerals/supplements.
It's quite maddening but not much else to do but keep chugging along.
I've found temporary relief here and there, with memantine, adderall, ritalin, minocycline. It's clear none of them are addressing the root cause as the relief is fleeting and inconsistent. CBD oil may be the most consistent thing I've tried.
It makes trying to live life difficult as I just literally can't think about the things I enjoy or want to do, let alone attempt to fully plan something in my head and remember it.