Being a Ken/Yun player, you shouldn’t have too much trouble against a turtling Akuma. Um, if he’s just crouching and blocking, you should THROW him. And try footsies games. For example, you throw him, he’s knocked down. While he’s down, get real close to him and throw out a couple crouching shorts, then back up a bit (outside of his poke/throw range), see what he does. If h thought you were going to crouching short him again, he’s probably just crouching and blocking, giving you an opportunity to THROW him again. If he’s trying to do a wakeup move (Dragon punch, c.HP), then he jsut whiffed because you backed up outside of his poke/throw range, and he just left himself open for a punishment off of his whiffed wakeup move.
Sorry for the run-on sentences and bad sentence structure, but it’s 2am by me and i’m having trouble clearly explaining what I mean. But I hope you understand the overall strategy of footsies.