Look, he has every reason, he did not see her at her best, he in fact saw her at the opposite of her best! He saw her at her worst, her naughtiest.

Good news Logan, she has chosen not to become a supervillain, probably! I can definitely see them butting heads at the start and not getting along but being forced to work together, it would be interesting to see him have the opportunity to get to know her the way she once was and tbh she will both be glad that Charles has people with him in the future but also maybe even a teensy bit jealous... rubbing my little raccoon paws together for this!