The awfulness of Carrie is completely debateable, lol.
"Out For Blood" has no business having ever been sung on a Broadway stage and "It Hurts to be Strong" is probably one of the worst pop songs ever written, but "Eve Was Weak", "Evening Prayers", "I Remember How Those Boys Could Dance", and "Heaven" sung as an octet rival a lot of material that Sir Andrew Lloyd Webber has ever written (I know I'm gonna get comments about that statement, ha). The rest of the score works well for what it is, for the most part. When they decided to not have a book to the show, hire a cracked out choreographer, and an "artistic" brittish director, that's where many of the problems come in.
And shoot, they made a musical about Cats that ran for ages. That goes to prove ANYTHING can be made into a musical

If Carrie had stayed open longer/or the authors would allow a revival of the show (which has been tried), people'd probably have different opinions about the show, ha.
Bobby :)