This Yugioh Game is O.K. once you get past the steep, starting difficulty curve.
Constantly improve that deck. Once you get the points to buy the cards you need either, card shop or that password machine, do it! Stick to a deck stratagem that works for you.
Study your opponent. Once you know there deck better than they do, find a way to crush it. And, SAVE often. Due to the fact that most people that play this game for the first time, they don't know these things. And it's like watching a 2 year old play with nitroglycerin. Don't be that 2 year old. Know what you are getting into before you decide to get this game. It will be a long uphill battle, but a battle you can win... if you are dedicated.