What bot is the worst bot in history?
Worstfish.
Worstfish is not a chess.com bot. Obviously.
It wasn't specified that it had to be a chess.com bot.
The opening post clearly suggests it, as only chess.com bots were listed as candidates.
"worst chess bot in the world."
I doubt it.
I Agree with Toast Bread
WorstFish is generally considered the "worst" chess bot, designed specifically to play the mathematically lowest-evaluated move, making it harder to lose to than to beat. On Chess.com, Martin (250 ELO) is famous for being the weakest, frequently blundering pieces and offering easy wins. Other low-level bots include Fabian and Oscarbot