I am a very low level Ryu player that tends to turtle; Yun/Yang just give me nightmares. I think my main problem against Yun & Yang is they have, what seem to me, good tools to get inside and once they are inside their moves seem to be fast and link together well. Since they get in close to me I am constantly trying to figure out if they are going to combo me/throw/overhead me. Yun's block strings seem to have very small windows to punish them. When Yun is near me and I press a button I get hammered with a combo, if I don't press a button he is getting free pressure and will eventually throw me.
My natural tendency is to block if I don't know what to do. So I think the characters are just a good matchup against me as a
player regardless of what character I choose. Because the heavy rushdown has always been tough for me to deal with. I have the exact same problems with Yun/Yang in SSF4:AE. I feel like I am always on the defensive and trying to react to Yun/Yang and doing so poorly.
Any suggestions? I assume learning the matchups/framedata is going to be key. Knowing what I can and cannot punish etc.