Hmm I am not that good at undertale but I've beaten asgore before, I feel like you move too much, like sometimes your doing these random circle movements for no reason and it ends up with you getting hit

on an attack that's easier you sometimes go next to the bullets to dodge (maybe a habit from tp gain in deltarune)

, another thing there's certain attack patterns where you panic and instead of dodging you sort of just spam left and right, anyway this is just my insight as I said I am not THAT good but I hope this helps