That's what I used to think back in 2008 but I changed my mind once SN was released, she may not be Celine, Mariah in the vocal department but her writing skills make up for it, she plays instruments, etc. Girl is talented and her Grammys and acclaim prove it.
No need to be rude. You know very well that you wouldn't use her if she wasn't as successful.
Do you know my taste? No. I've stanned since 2006 when she was literally no one. Don't be angry because she's far more critically acclaimed and is currently more successful than any other pop star.