People keep complaining there and there about the server/crash/lag issues but Komoney hasn't updated the game for more than 2 months. YGO nowadays is basically to build those ridiculous META decks that can special summon 15 times a turn, have a lot of negates, and prevent your opponent to play. Good luck for hoping to play casually like good ol' days or just an "enjoyable" gameplay, even an AI can get ridiculously hard to beat. Honestly, I'm utterly disappointed to what YGO has become now.