There are far too many moments of narrative that require the audience to care about characters, and I have not been given sufficient reason to give a single solitary shit about any of these monks.

Except maybe William? But the protagonist, Adso... Even he hasn't been sufficiently fleshed out as a person for whom I could care. I don't like any of these characters, and most of it is because I still struggle to tell who is who and why I'm supposed to care about the events surrounding them. Also, by 'like', I mean "even if I wouldn't like these characters as people, I can sufficiently see them as characters who are interesting enough to engage with."