Maybe a different brain?
I have some neurological issues that impair the functioning of the frontal lobe in my brain, and this causes severe executive dysfunction.
Executive dysfunction "occurs when the brain has difficulty with important functions related to memory, attention, and thinking", as well as emotional regulation (severe oversimplification, but still.) As I've aged, my symptoms have grown more and more debilitating; and this has left me feeling like an unfit adult in a cold world.
To look at me, you'd possibly never know the sort of shambles my internal world is in; but living inside of my brain is beyond exhausting. I've been distressed as far back as I can remember, and I'm just ready to have some relief for once.