Complex sentence: Although having such high ratings, critical reaction to The Bible has been mixed, as it currently has "mixed or average reviews" at Metacritic, only having a score of 44 out of 100 based on 13 critical reviews.
Split into simpler sentences: Although having such high ratings, critical reaction to The Bible has been mixed. It currently has a "mixed or average reviews" rating at Metacritic, only having a score of 44 out of 100 based on 13 critical reviews.