I Write a Diary Cursing Iron Man, and the Avengers Show Up?

Lin Yu transmigrates to the Marvel Universe and awakens a System: all he has to do is write a diary to gain superpowers, money, and supplies. If he can think of it, he can get it. Since he's going to be writing a diary anyway, why not use it to vent? Who writes a serious diary in the first place?

And so the entire Marvel Universe starts to take a strange turn.

Iron Man: "You call me fictional and then insult me?"

Hulk: "Who are you calling a dummy?"

Natasha: "What did you just call me? Who are you insulting?"

Captain Marvel: "Your whole family are Marvelous Aunties!!"

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.