I don't think 'Love Yourself' was a disappointment. I think that as a BTS fan, we should be open to their music. It's always different and changing each comeback. It's a given that their style and concept will always be different each time.
LY made me feel like they were back to their old style but also made their old style more new and refreshing to fit to today's style. I'm not trying to be defensive or anything. I just thought I say something to remind us, everyone that BTS will always go different routes each comeback and even BTS said so themselves.