Im literally new to sarah but my friend/teacher taught me that Sarah is a frame-trapper 6P 2P and P are the main moves you'll want to use to keep the pressure going
P = 10 Frames which is beat out by our speed queens Kasumi Christie and Pai
6P = 11 Frames which should/does beat out most attacks since they are like i15 on startup on a good day.
and Finally 2P = 12 Frames it teh crouches sarah underneath grabs and highs while its speed stops MANY ATTACKS, in this battle:
you could have beaten out kasumi's P jab with 2P, i feel as though you respected le_automatique (because his Kasumi is really great) too much and forgot to apply the pressure.
if you're bad with wakeup guessing then i suggest using 6H+K (Forward dash) ((as they are getting up) 2H+K as a combo ender. this resets the whole wakeup advantage and disadvantage and lets you continue shutting down the eternal heroine's offensive abilities.