I don't know if you could consider me really good at Samsho 2 but I can beat it with 1 credit. I think a lot of the problem is that people rarely realize how much depth there is in that game. Priorities are a large part of it and realizing which moves the particular character your playing have higher priority than others is important. A lot of people don't know about the rolls or dropping down motions either. In general it is a slow paced fighting game, and that's uncommon in itself among fighting games, and throws a lot of people off. In a lot of fighting games the only real difference between a strong and weak attack is that strong attacks are slower, but in Samsho I've always felt the distance is the big difference. Knowing when one will hit and the other won't can be a huge help at getting better at the game.

Don't know if that will help you much but I hope so, I am one of those people who thinks 2 is the best in the series.