> Your sentence was unidiomatic to this native English speaker
[emphasis mine]
Fair enough, but I obviously picked up this manner somewhere, and from what
I remember, it was long before internet got crowded by people from all over
the world, so I think it was from some other native English speakers.
> My offer was a joke, but never mind.
Your joke went over my head so high that I recoiled from the superiority vibe
I got from reading it as an actual offer. (I just wanted you to know that, now
that it's clear what it was.)
My offer was a joke, but never mind.