As Homer said, it's his opinion. He has a right to it. There are lots of singers and bands that people like and others can't stand them. It doesn't make either side right or wrong. It's just an opinion. It's how it sounds to the individual ear.
Basically we are saying people can spout any old crap by putting the caveat, imo.
No issue with anyone stating they don’t like or rate her, etc, I totally agree with you about individual tasted, but unless they are a professional in the music industry and can back up the facts, then its unsubstantiated garbage.