Felix! Yu-Gi-Oh (the one on Netflix) was so confusing, because it is not the original anime. This is from 2000, called Duel Monsters, while the original series from 1998 explains a lot
Yu-Gi-Oh! (TV Series 1998) - IMDb
Stream isasplay | Listen to yu-gi-oh original soundtrack playlist online for free on SoundCloud
Dark Yugi | Villains Wiki | Fandom
Yu-Gi-Oh! Duel Monsters (video game) | Yu-Gi-Oh! Wiki | Fandom