Philosoraptor

I'm pretty sure in the anime it says that their quirk is if I remember correctly, noticeable at the age of 4.

Yeah, signs of the quirk are at age four (not you, stupid izuku-kun)

I can't remember stuff that much but that I remember (Oooooooooooooh! Damn, deku got burned by ya!)

He could have done anything else, He could've wrote a book series titled A Hero Analysis: (Name of hero) and probably made bank.

Hmm

Then I would've just been chilling in my penthouse making raisin bread to my playlist.
I Jam...I know all the word to Ice Ice Baby and Super Bass and I don't sing.. I perform

I see.

He could have just copied a bunch of his notebooks, published them, and there you go, Izuku Midoryia, mega, quirkless, billionaire (but no, dumbass wanted to be like AlL MiGhT, I mean, come on, you could have done literally anything else, but no, you mad the guy give you a quirk, and pretty much made life hard, broke your damn arms, etc etc...)

So slowly their daughter started to disappear... holy crap that'd be terrifying

Pretty much