Same actually, I'm a bit of a completionist too so I always do all the routes when it's possible
(it happened to me with Morenatsu for example, Shin doesn't look really interesting when you're in the middle of someone else's route, but when you're doing Shin's route you realize he's a really sweet character, I guess it just takes time and some chat to appreciate a character !)
Thanks for reminding me to finish Extracurricular Activities btw, I still haven't done any routes besides Harold's because it would still feel like cheating on him lel, guess I grew too fond of him (still gonna do the other routes tho)
And yeah I finished the Delta Academy a few days ago and posted a comment there, so it was probably me !