She is not a good performer.
She doesn't tribute anything to her music (writing 3 words on a song with 5 co-writers doesn't count).
She seems like a hypocrite.
She acts like 12 while she's almost 30.
Her music is not THAT good ( I only like 3 songs of her).
She doesn't give a **** about her fans.
She doesn't make me feel insecure about my fave at all, she can have 5 No.1 single but she doesnt make any impacts and isn't a global phenomenon. I don't even want to mention album sales/ awards

The only thing she's better than my fave is her beauty, which will eventually fade away.