Every isekai makes me think that if an MC won the lottery, they would immediately give me the winning ticket because they somehow "don't deserve it."
Like, obviously you were poor in the original world! You keep turning down your paycheck, idiot!
I mean, in English, a favor unlooked for would make me say "are you sure?" So, I get an MC asking "is that okay;" it's just an ignorant translation.
But if you demand that I keep my money with any kind of passion, I don't give a shit if you're being performative; I'll just keep the reward, and your performative ass can stay poor. If you don't like it, then don't lie.
This MC, though... she's just a seething ball of self loathing; nothing performative, there. Mental illness, yes; performativism, no.