I think I've counted 3 saint mangas/novels that have done the "maid accidentally trips and drops cake on villianess face" trope and it's still funny so far. (Page 14)
Why continue to work under someone that bad and rather than quit you kill her.. What did they think would happen if she died? They would all lose their jobs since they won't be needed anymore.
i still enjoying this but the whole point of her "i need to be careful or they will notice something off" kinda pointless when no one really dare to point out how off she is, those know her from before just "guess she really changed" and just roll with it.