I think that with Subby you have to use him a bit differently. He has some decent pokes, if you use him in a sort of hit and run way you can confuse the opponent. Like you play footsies with them, then get your damage, zone them out, make them play recklessly trying to get in, use that to your advantage, punish their mistake, don't give them time to adapt. Also using his disadvantages to your advantage is good.
I haven't read that guide, lol, how bad is it?