I'd ask first and foremost WHAT did you like about it and which part. Leaving my personal crazy theories out There is a HUGE tonal shift at the end of book 4. Did you like it more before that? After that? Did you like the magic? Did you prefer the sorta mysteries?

Did you love reading about those people growing and changing?

Personally i cannot recommend enough Superpowereds by Drew Hayes. 4 books and a few side stories, set in college and has that adventure and fantasy feel with a serious mystery woven through the whole series.

BUT i pretty much have never reread any of the HP books after 4 once the 7th came out.

If you liked the later books and the coming of age than Yes, Percy Jackson, the first few books at least capture a lot of that grim dark coming of age in a world that was messed up by the previous generation.

I would also recommend the Books of magic. The novels have no mystery but they "inspired" HP a lot.