Kaiba sure has a pretty messed up view on the world. But then again his adopted father killed himself in front of him to show him what defeat means.
But Anzu told him a piece of her mind, and so Kaiba may have won the game but ended up being the real loser at end.
Anzu really shined here.
Anyway, Kaiba went into the castle along with Bandit Keith, taking Yugi's five star chips. Things all seemed hopeless for Yugi and his friends until Mai showed up and offered to repay her debt to Yugi.
Also another thing the anime change is having Yugi have ptsd and loosing all of his courage for an episode, giving up completely. So Anzu and Mai can duel together. This change again served no purpose other than to prolong everything and have more card games. It even undermined Yugi as a character, yet again. In the manga Yugi does not give up and gets back on track thanks to his friends cheering and Anzu's speach!