On LiChess, FM knightprince gave a simul where I participated (our game). I
blundered a pawn played a pawn gambit, but managed to complicate things and won it back. Afterwards, the game would have led to a drawn endgame.
The FM offered a draw; I wanted to refuse, but thought that would be perceived as ungrateful, so I accepted. I wasn't expecting to win; I just wanted to play out the endgame for the experience.
Question: Is it bad etiquette to decline a draw offer when participating in a simul?