Well done,@Pleasenomoreglitter ...... you'll get there. I think EPIC 1 and 2 are actually harder - and longer! - than EPIC 3 and Heat, so maybe try one of the latter? (I've not tried the other programmer so can't comment...)
I know what you mean re. the burpees. Ii think it's as much as an agility thing as strength and stamina, so maybe you might benefit from some agility focused exercises and stretch sessions. And the Bowflex 3-minute plank is always useful.
I'll also admit that I often do a Growingannanas HIIT session instead of Caroline's, or substitute one of Anna's other workouts when I'm just too tired/not in the mood for Ms Girvan!!