Harry Potter and John Wick for starters

that's not fictional

but he is tho.
He doesn't technically exist IRL.

Uhhhh

Sebastian, Agent 8, Medkit, Mr Grizz, and probably a few more I'm forgetting

Ok 8 I can agree with.
Grizz was A TON of psychological pain, reality shattering, emotional pain, i agree.
SEBASTIAAAAN yeah fr tho
IDK medkit lore sorry

Medkit lost his eye after Phighting with subspace

He's also in a cult if that matters

oh lol ok

but still all the characters you said have gone through equal amounts of or more pain than THIS GUY

8 literally got LOBOTOMIZED and had their memories INCENERATED