Is there a name for this phenomenon?

Insanity

Ugh so relatable my dude.
I don’t hav3 an answe4 5hiugh, sorry.
Wha5 about not having good thought to word translation? That’s meee

yes, it's called growing up. It happens to all of us. When you get older, you realize the tooth fairy and the Easter bunny aren't real because your brain matter develops and you mature more and more as time passes. Don't worry, it's normal.