Goddam, how salty is the artist-san really?
I mean, sure, cheaters are assholes. But in the end of the session, you wouldn't know who is behind the colorful running bean, and you rarely will meet again in the next session; and if you do, you won't even recognize him.
This sort of edgy monologue is what you always see in some butthurt spergs' pm in For Honor (or WoW) after losing hard.
Tl;dr, Artist-san is not a graceful loser.