Here's a proper 100% win rate deck (tried many other alleged 100% win rate decks, and it turned out to be not even close to 100%).
Not very expensive (for most players), doesn't use any monsters, low IQ requirement farm deck (just what you need to do boring stuff like farming).
Slightly altered Yummy's decklist.
Tip: overkill on trap number to always draw them, and make sure to always set 2 traps at a time in case one gets hit by Ultimate providence (until both are in his/her graveyard).
Final turn play:
1. use Hey Trunade (don't worry if it gets hit by Providence since that's the only card that can mess up your combo),
2. summon Vassal,
3. use Cyber Style (make sure you let 1 Mystic Tomato hit you twice in earlier moves to get your LP below 2000) to spawn 2 Protos,
4. use Secret Pass on the Vassal,
5. boost your Protos (not the Vassal) with spells,
6. attack directly with Vassal.
Fine. It's not 100%, but it's up there.
It can fail if you get very unlucky and all three tomatos are drawn right at the bottom of Yubel's deck or if you 🔥 up and clog your backrow with 3 sets you cannot activate.
But at least you eliminate the risks that other decks bring in terms of bricking your own hands.