yami marik's main weakness in duel skills are his mindset and the way he likes to duel, he is super arrogant and likes to slow torture his opponent, plus for him, all it matters is a shadow game duel, he could had ended joey way earlier in their duel, joey literally was defeated during the lava golem combo phases by yami marik, but he decided to let his torture persona/side to become ecstatic again, thats why, the duel dragged on, and was saved by the plot, cuz joey passed out in the final round, otherwise, when he fought more seriously, even atem had trouble with him, and couldnt counter him
overall, yami marik and bandit king bakura, the best og ygo villains
overall, yami marik and bandit king bakura, the best og ygo villains